branch-3.0: [improve](load) improve error messages for "no backend available" #47510

[github-actions]

Cherry-picked from #47510

[hello-stephen]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR.

Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[hello-stephen]

run buildall

[doris-robot]

TPC-H: Total hot run time: 40686 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit c1be96da3fc8f7c75387f2133dfdea4832895047, data reload: false

------ Round 1 ----------------------------------
q1	17725	7498	7233	7233
q2	2060	166	162	162
q3	10556	1142	1098	1098
q4	10218	718	748	718
q5	7720	2936	2861	2861
q6	231	147	146	146
q7	995	608	611	608
q8	9356	1912	2007	1912
q9	6697	6416	6402	6402
q10	6935	2301	2298	2298
q11	469	267	260	260
q12	400	210	207	207
q13	17769	2972	2997	2972
q14	245	207	211	207
q15	556	535	530	530
q16	666	589	593	589
q17	965	621	554	554
q18	7484	6672	6573	6573
q19	1395	1077	1090	1077
q20	487	201	194	194
q21	4009	3171	3088	3088
q22	1109	1016	997	997
Total cold run time: 108047 ms
Total hot run time: 40686 ms

----- Round 2, with runtime_filter_mode=off -----
q1	7180	7176	7166	7166
q2	328	234	229	229
q3	2915	2936	3046	2936
q4	2068	1807	1815	1807
q5	5678	5695	5717	5695
q6	217	137	137	137
q7	2196	1812	1826	1812
q8	3350	3490	3501	3490
q9	8854	8904	8798	8798
q10	3623	3576	3555	3555
q11	588	502	527	502
q12	781	612	621	612
q13	8881	3150	3133	3133
q14	294	286	269	269
q15	577	533	518	518
q16	701	650	651	650
q17	1817	1648	1607	1607
q18	8295	7793	7499	7499
q19	1687	1579	1515	1515
q20	2042	1780	1780	1780
q21	5272	5181	5094	5094
q22	1122	1011	1025	1011
Total cold run time: 68466 ms
Total hot run time: 59815 ms

[doris-robot]

TPC-DS: Total hot run time: 192363 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 c1be96da3fc8f7c75387f2133dfdea4832895047, data reload: false

query1	954	377	366	366
query2	6532	2227	2165	2165
query3	6710	223	225	223
query4	34243	23966	23471	23471
query5	4303	457	442	442
query6	293	181	178	178
query7	4627	316	316	316
query8	291	222	235	222
query9	9311	2712	2699	2699
query10	501	262	265	262
query11	18196	15554	15204	15204
query12	155	104	102	102
query13	1632	427	416	416
query14	10023	7098	7422	7098
query15	252	168	183	168
query16	8089	463	466	463
query17	1633	564	539	539
query18	2146	313	312	312
query19	366	154	152	152
query20	113	103	108	103
query21	206	101	102	101
query22	4568	4211	4256	4211
query23	34446	34135	34015	34015
query24	11188	2840	2847	2840
query25	654	386	381	381
query26	1269	162	171	162
query27	2539	335	342	335
query28	7972	2439	2453	2439
query29	902	465	441	441
query30	332	172	167	167
query31	1046	769	801	769
query32	102	60	60	60
query33	781	302	289	289
query34	936	496	519	496
query35	923	746	710	710
query36	1110	974	965	965
query37	147	85	76	76
query38	4033	3793	3872	3793
query39	1507	1418	1454	1418
query40	205	95	97	95
query41	52	48	48	48
query42	114	110	102	102
query43	542	505	504	504
query44	1273	834	802	802
query45	179	169	164	164
query46	1138	713	706	706
query47	1962	1865	1879	1865
query48	464	371	371	371
query49	1180	383	386	383
query50	836	405	417	405
query51	7257	7122	6923	6923
query52	105	93	91	91
query53	252	182	183	182
query54	1288	464	465	464
query55	85	83	81	81
query56	268	244	242	242
query57	1237	1153	1096	1096
query58	235	201	220	201
query59	3246	3151	3043	3043
query60	287	256	264	256
query61	108	110	109	109
query62	906	732	730	730
query63	222	187	186	186
query64	5343	639	649	639
query65	3257	3172	3198	3172
query66	1435	313	309	309
query67	15958	15753	15610	15610
query68	3972	593	601	593
query69	423	273	262	262
query70	1191	1092	1130	1092
query71	338	256	250	250
query72	6224	4041	4036	4036
query73	754	347	347	347
query74	10016	9259	9521	9259
query75	3329	2651	2636	2636
query76	2639	1018	1082	1018
query77	460	278	282	278
query78	10399	9694	9621	9621
query79	1159	616	601	601
query80	635	432	450	432
query81	530	237	238	237
query82	219	132	120	120
query83	167	146	156	146
query84	239	78	79	78
query85	980	293	285	285
query86	309	295	274	274
query87	4391	4292	4288	4288
query88	3660	2401	2356	2356
query89	390	287	295	287
query90	1991	185	193	185
query91	181	152	167	152
query92	61	51	52	51
query93	1037	566	543	543
query94	847	294	295	294
query95	358	257	257	257
query96	608	280	273	273
query97	3308	3161	3197	3161
query98	218	220	199	199
query99	1581	1436	1404	1404
Total cold run time: 297079 ms
Total hot run time: 192363 ms

[doris-robot]

ClickBench: Total hot run time: 32.85 s

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit c1be96da3fc8f7c75387f2133dfdea4832895047, data reload: false

query1	0.03	0.03	0.03
query2	0.07	0.03	0.02
query3	0.24	0.07	0.06
query4	1.62	0.10	0.10
query5	0.51	0.50	0.51
query6	1.14	0.74	0.73
query7	0.02	0.01	0.02
query8	0.03	0.03	0.03
query9	0.56	0.51	0.50
query10	0.55	0.55	0.57
query11	0.14	0.10	0.11
query12	0.13	0.11	0.13
query13	0.62	0.60	0.59
query14	2.72	2.74	2.77
query15	0.91	0.86	0.83
query16	0.36	0.38	0.39
query17	1.05	1.00	1.06
query18	0.24	0.22	0.22
query19	1.85	1.88	1.98
query20	0.01	0.01	0.02
query21	15.36	0.59	0.55
query22	2.84	1.82	2.80
query23	16.97	0.94	0.74
query24	3.16	1.21	2.01
query25	0.27	0.10	0.11
query26	0.56	0.15	0.14
query27	0.06	0.03	0.04
query28	9.74	1.12	1.06
query29	12.58	3.20	3.19
query30	0.25	0.06	0.06
query31	2.86	0.39	0.38
query32	3.24	0.46	0.45
query33	3.01	3.02	3.00
query34	17.14	4.46	4.47
query35	4.57	4.49	4.53
query36	0.69	0.51	0.48
query37	0.09	0.06	0.06
query38	0.05	0.04	0.03
query39	0.03	0.03	0.02
query40	0.16	0.12	0.13
query41	0.08	0.02	0.03
query42	0.03	0.02	0.02
query43	0.04	0.03	0.03
Total cold run time: 106.58 s
Total hot run time: 32.85 s

[dataroaring]

LGTM