[Fix](load) fix load channel leak when load exception occurs (#30915)

[liaoxin01]

Proposed changes

Issue Number: close #xxx

pick from: #30915

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[doris-robot]

Thank you for your contribution to Apache Doris.
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[liaoxin01]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 37.83% (8035/21238)
Line Coverage: 29.50% (65503/222013)
Region Coverage: 28.94% (33651/116296)
Branch Coverage: 24.79% (17268/69644)
Coverage Report: http://coverage.selectdb-in.cc/coverage/536a9ee2e609c979b58656769551d6d36e78a03e_536a9ee2e609c979b58656769551d6d36e78a03e/report/index.html

[doris-robot]

TPC-H: Total hot run time: 49706 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 536a9ee2e609c979b58656769551d6d36e78a03e, data reload: false

------ Round 1 ----------------------------------
q1	17828	4359	4370	4359
q2	2024	151	136	136
q3	10492	1843	1916	1843
q4	10327	1233	1302	1233
q5	8409	3949	3921	3921
q6	223	124	122	122
q7	2019	1583	1590	1583
q8	9546	2700	2706	2700
q9	13172	10781	10386	10386
q10	8647	3507	3481	3481
q11	405	234	247	234
q12	475	293	307	293
q13	18356	3955	4010	3955
q14	351	313	335	313
q15	509	446	454	446
q16	707	590	587	587
q17	1121	981	934	934
q18	7294	6895	6973	6895
q19	1692	1557	1526	1526
q20	508	315	289	289
q21	4440	4169	4080	4080
q22	502	390	403	390
Total cold run time: 119047 ms
Total hot run time: 49706 ms

----- Round 2, with runtime_filter_mode=off -----
q1	4340	4325	4270	4270
q2	317	222	219	219
q3	4190	4158	4138	4138
q4	2747	2739	2753	2739
q5	7225	7157	7155	7155
q6	235	119	119	119
q7	3238	2888	2834	2834
q8	4323	4476	4459	4459
q9	17106	16969	16923	16923
q10	4225	4278	4279	4278
q11	789	689	704	689
q12	1024	861	855	855
q13	7030	3728	3747	3728
q14	456	406	422	406
q15	486	458	454	454
q16	764	710	700	700
q17	3819	3811	3857	3811
q18	8755	8761	8773	8761
q19	1714	1635	1693	1635
q20	2424	2151	2154	2151
q21	8619	8527	8581	8527
q22	1086	957	991	957
Total cold run time: 84912 ms
Total hot run time: 79808 ms

[doris-robot]

TPC-DS: Total hot run time: 237243 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 536a9ee2e609c979b58656769551d6d36e78a03e, data reload: false

query1	1116	394	389	389
query2	7661	2285	2040	2040
query3	6915	210	206	206
query4	21946	18814	18834	18814
query5	20047	6353	6332	6332
query6	729	217	223	217
query7	5437	300	307	300
query8	250	281	255	255
query9	3115	2644	2620	2620
query10	426	280	285	280
query11	11367	10673	10696	10673
query12	120	74	74	74
query13	5627	637	599	599
query14	18801	13110	13355	13110
query15	384	233	228	228
query16	6417	254	262	254
query17	3089	867	871	867
query18	2261	418	396	396
query19	202	141	141	141
query20	78	73	77	73
query21	181	92	97	92
query22	5234	5147	5105	5105
query23	32502	31942	31914	31914
query24	6744	6480	6562	6480
query25	512	423	396	396
query26	477	162	154	154
query27	1703	290	282	282
query28	6133	2237	2198	2198
query29	2937	2799	2707	2707
query30	249	163	161	161
query31	914	724	747	724
query32	56	56	57	56
query33	387	252	240	240
query34	873	459	473	459
query35	1112	932	898	898
query36	1788	1476	1510	1476
query37	91	57	62	57
query38	3038	2873	2938	2873
query39	1368	1314	1326	1314
query40	198	95	90	90
query41	35	33	31	31
query42	81	84	87	84
query43	631	642	545	545
query44	1122	711	702	702
query45	238	226	225	225
query46	1225	973	966	966
query47	2050	1841	1843	1841
query48	986	676	649	649
query49	611	372	351	351
query50	851	588	595	588
query51	5592	5438	5458	5438
query52	81	79	74	74
query53	438	313	309	309
query54	2451	2245	2242	2242
query55	76	77	77	77
query56	215	196	190	190
query57	1137	1090	1136	1090
query58	205	199	210	199
query59	3560	3167	3139	3139
query60	197	185	197	185
query61	82	80	77	77
query62	827	503	505	503
query63	471	327	331	327
query64	1916	1254	1270	1254
query65	3686	3615	3658	3615
query66	808	367	361	361
query67	15750	15449	16071	15449
query68	8926	648	657	648
query69	558	331	348	331
query70	2127	1801	1698	1698
query71	411	304	303	303
query72	4536	3318	3283	3283
query73	721	306	316	306
query74	6310	5882	5816	5816
query75	4900	3419	3454	3419
query76	5616	1185	1215	1185
query77	929	260	245	245
query78	31970	52446	46404	46404
query79	14633	616	643	616
query80	4491	371	378	371
query81	569	227	232	227
query82	567	100	94	94
query83	424	130	140	130
query84	257	68	70	68
query85	2404	284	270	270
query86	444	376	388	376
query87	3267	2976	2972	2972
query88	6240	2291	2274	2274
query89	375	280	271	271
query90	2497	211	209	209
query91	163	120	132	120
query92	58	50	47	47
query93	3907	591	592	591
query94	1730	204	196	196
query95	1117	1047	1052	1047
query96	648	339	330	330
query97	6451	6297	6277	6277
query98	194	177	170	170
query99	3854	896	894	894
Total cold run time: 349101 ms
Total hot run time: 237243 ms

[doris-robot]

ClickBench: Total hot run time: 30.95 s

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 536a9ee2e609c979b58656769551d6d36e78a03e, data reload: false

query1	0.02	0.02	0.02
query2	0.06	0.03	0.02
query3	0.24	0.05	0.04
query4	1.81	0.07	0.07
query5	0.52	0.52	0.53
query6	1.28	0.62	0.67
query7	0.02	0.02	0.01
query8	0.04	0.02	0.02
query9	0.53	0.48	0.48
query10	0.54	0.55	0.54
query11	0.11	0.09	0.08
query12	0.11	0.09	0.09
query13	0.61	0.61	0.60
query14	0.78	0.77	0.81
query15	0.78	0.77	0.76
query16	0.40	0.37	0.37
query17	1.01	1.04	1.02
query18	0.23	0.26	0.24
query19	1.92	1.80	1.90
query20	0.01	0.01	0.00
query21	15.49	0.57	0.56
query22	1.93	2.12	1.38
query23	17.46	0.97	1.10
query24	6.68	1.34	1.37
query25	1.45	0.12	0.11
query26	0.31	0.15	0.14
query27	0.11	0.11	0.10
query28	6.65	0.74	0.71
query29	12.72	2.25	2.27
query30	0.57	0.49	0.47
query31	2.83	0.39	0.37
query32	3.41	0.50	0.50
query33	3.11	3.09	3.09
query34	15.25	4.80	4.80
query35	4.84	4.82	4.85
query36	1.06	1.02	1.03
query37	0.06	0.05	0.05
query38	0.04	0.02	0.02
query39	0.02	0.01	0.02
query40	0.15	0.14	0.14
query41	0.07	0.01	0.01
query42	0.02	0.02	0.01
query43	0.02	0.01	0.02
Total cold run time: 105.27 s
Total hot run time: 30.95 s

[doris-robot]

Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G'

Load test result on commit 536a9ee2e609c979b58656769551d6d36e78a03e with default session variables
Stream load json:         19 seconds loaded 2358488459 Bytes, about 118 MB/s
Stream load orc:          58 seconds loaded 1101869774 Bytes, about 18 MB/s
Stream load parquet:      32 seconds loaded 861443392 Bytes, about 25 MB/s
Insert into select:       21.5 seconds inserted 10000000 Rows, about 465K ops/s