Add support for non-generic IEnumerable, IList, ICollection

[layomia]

Partly addresses https://github.com/dotnet/corefx/issues/36643.

Benchmarks: dotnet/performance#547.

Method	ElementCount	Mean	Error	StdDev	Median	Gen 0	Gen 1	Gen 2	Allocated
DeserializeGenericList	2	550.7 ns	10.684 ns	10.493 ns	555.2 ns	0.0515	-	-	216 B
DeserializeIEnumerable	2	1,586.2 ns	31.569 ns	73.791 ns	1,595.6 ns	0.1583	-	-	664 B
DeserializeIList	2	1,565.6 ns	30.513 ns	44.725 ns	1,558.8 ns	0.1583	-	-	664 B
DeserializeICollection	2	1,543.3 ns	28.938 ns	45.899 ns	1,540.2 ns	0.1583	-	-	664 B
SerializeGenericList_ToUtf8Bytes	2	523.0 ns	10.527 ns	21.265 ns	525.8 ns	0.0553	-	-	232 B
SerializeIList_ToUtf8Bytes	2	590.0 ns	11.848 ns	28.157 ns	584.1 ns	0.0553	-	-	232 B
SerializeIEnumerable_ToUtf8Bytes	2	546.1 ns	6.353 ns	5.943 ns	545.2 ns	0.0553	-	-	232 B
SerializeICollection_ToUtf8Bytes	2	575.6 ns	4.637 ns	4.111 ns	574.8 ns	0.0553	-	-	232 B
DeserializeGenericList	50	6,577.9 ns	130.163 ns	121.755 ns	6,625.2 ns	0.8698	-	-	3664 B
DeserializeIEnumerable	50	30,287.2 ns	591.428 ns	580.862 ns	30,383.1 ns	3.6011	0.0610	-	15184 B
DeserializeIList	50	30,452.5 ns	287.717 ns	269.131 ns	30,520.1 ns	3.6011	0.0610	-	15184 B
DeserializeICollection	50	30,592.4 ns	522.230 ns	488.495 ns	30,795.8 ns	3.6011	0.0610	-	15184 B
SerializeGenericList_ToUtf8Bytes	50	5,861.5 ns	101.192 ns	89.704 ns	5,876.9 ns	0.1678	-	-	704 B
SerializeIList_ToUtf8Bytes	50	8,357.5 ns	190.401 ns	561.400 ns	8,366.6 ns	0.1678	-	-	704 B
SerializeIEnumerable_ToUtf8Bytes	50	7,646.3 ns	46.657 ns	41.361 ns	7,626.8 ns	0.1678	-	-	704 B
SerializeICollection_ToUtf8Bytes	50	8,039.4 ns	153.934 ns	171.097 ns	7,984.7 ns	0.1678	-	-	704 B
DeserializeGenericList	100	13,310.7 ns	275.124 ns	643.093 ns	13,063.2 ns	1.7090	-	-	7208 B
DeserializeIEnumerable	100	65,976.2 ns	1,314.053 ns	3,248.014 ns	64,810.4 ns	7.2021	-	-	30328 B
DeserializeIList	100	61,431.8 ns	1,201.307 ns	1,123.703 ns	61,911.3 ns	7.2021	0.1221	-	30328 B
DeserializeICollection	100	61,920.1 ns	1,473.649 ns	1,513.329 ns	62,189.8 ns	7.2021	0.0610	-	30328 B
SerializeGenericList_ToUtf8Bytes	100	11,497.6 ns	227.366 ns	295.640 ns	11,507.6 ns	0.2747	-	-	1200 B
SerializeIList_ToUtf8Bytes	100	15,675.2 ns	216.392 ns	191.826 ns	15,707.4 ns	0.2747	-	-	1200 B
SerializeIEnumerable_ToUtf8Bytes	100	15,078.5 ns	249.513 ns	233.394 ns	15,182.4 ns	0.2747	-	-	1200 B
SerializeICollection_ToUtf8Bytes	100	15,126.9 ns	145.512 ns	136.112 ns	15,150.1 ns	0.2747	-	-	1200 B

Json.NET

No deserialization support for IEnumerable and ICollection

Method	ElementCount	Mean	Error	StdDev	Median	Gen 0	Gen 1	Gen 2	Allocated
DeserializeGenericList	2	21,603.1 ns	5,364.263 ns	15,647.808 ns	12,900.0 ns	-	-	-	2.69 KB
DeserializeIList	2	847.2 ns	15.718 ns	14.702 ns	848.0 ns	0.6571	-	-	2.69 KB
SerializeGenericList_ToString	2	567.1 ns	9.628 ns	9.006 ns	569.1 ns	0.3328	-	-	1.36 KB
SerializeIList_ToString	2	556.7 ns	10.366 ns	9.189 ns	557.7 ns	0.3328	-	-	1.36 KB
SerializeIEnumerable_ToString	2	558.2 ns	8.070 ns	7.549 ns	561.1 ns	0.3328	-	-	1.36 KB
SerializeICollection_ToString	2	544.3 ns	10.343 ns	11.496 ns	545.5 ns	0.3328	-	-	1.36 KB
DeserializeGenericList	50	6,503.7 ns	129.334 ns	181.308 ns	6,448.2 ns	1.3657	-	-	5.59 KB
DeserializeIList	50	6,978.5 ns	73.368 ns	65.038 ns	6,979.7 ns	1.3657	-	-	5.59 KB
SerializeGenericList_ToString	50	4,470.0 ns	69.800 ns	65.291 ns	4,461.9 ns	0.6943	-	-	2.85 KB
SerializeIList_ToString	50	4,570.4 ns	69.667 ns	58.175 ns	4,592.5 ns	0.6943	-	-	2.85 KB
SerializeIEnumerable_ToString	50	4,626.5 ns	119.268 ns	254.169 ns	4,540.5 ns	0.6943	-	-	2.85 KB
SerializeICollection_ToString	50	4,462.8 ns	80.141 ns	74.964 ns	4,453.0 ns	0.6943	-	-	2.85 KB
DeserializeGenericList	100	12,231.8 ns	241.116 ns	475.939 ns	12,086.9 ns	2.0905	-	-	8.57 KB
DeserializeIList	100	15,465.8 ns	407.606 ns	1,149.660 ns	15,303.9 ns	2.0905	-	-	8.57 KB
SerializeGenericList_ToString	100	49,678.3 ns	5,560.972 ns	15,684.820 ns	49,750.0 ns	-	-	-	4.9 KB
SerializeIList_ToString	100	8,977.2 ns	191.709 ns	537.573 ns	8,891.2 ns	1.1902	-	-	4.9 KB
SerializeIEnumerable_ToString	100	8,925.4 ns	226.102 ns	622.750 ns	8,636.3 ns	1.1902	-	-	4.9 KB
SerializeICollection_ToString	100	8,508.9 ns	73.005 ns	64.717 ns	8,517.8 ns	1.1902	-	-	4.9 KB

Hot-path perf diff

There seems to be an dependency update lag between the perf and corefx repos, so I'll run a hot-path (de)serialization perf diff later. I don't suspect there are any regressions.

[layomia]

Changes here have been merged in #38319.