Read/Write Big/LittleEndian support for Guid

[AlexRadch]

Close #86798 issue.

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Issue Details

---

Close #86798 issue.

Author:	AlexRadch
Assignees:	-
Labels:	area-System.Runtime, new-api-needs-documentation, community-contribution
Milestone:	-

[tannergooding]

@AlexRadch, looks like this was just pending some basic perf numbers. Were you able to collect those?

[AlexRadch]

@AlexRadch, looks like this was just pending some basic perf numbers. Were you able to collect those?

I already wrote. I got next scores:

|               Type |           Method |       Mean |     Error |    StdDev | Ratio | RatioSD |   Gen0 | Allocated | Alloc Ratio |
|------------------- |----------------- |-----------:|----------:|----------:|------:|--------:|-------:|----------:|------------:|
|      BenchFromSpan |      GO_FromSpan |  58.594 ns | 0.4230 ns | 0.3750 ns |  1.00 |    0.00 |      - |         - |          NA |
|      BenchFromSpan |      GN_FromSpan |   6.271 ns | 0.1132 ns | 0.0884 ns |  0.11 |    0.00 |      - |         - |          NA |
|   BenchToByteArray |   GO_ToByteArray | 168.241 ns | 1.3852 ns | 1.2957 ns |  2.87 |    0.03 | 0.0956 |     400 B |          NA |
|   BenchToByteArray |   GN_ToByteArray | 139.170 ns | 1.2337 ns | 1.1540 ns |  2.38 |    0.02 | 0.0956 |     400 B |          NA |
| BenchTryWriteBytes | GO_TryWriteBytes |  70.844 ns | 1.4296 ns | 1.3372 ns |  1.21 |    0.02 |      - |         - |          NA |
| BenchTryWriteBytes | GN_TryWriteBytes |  14.141 ns | 0.0899 ns | 0.0841 ns |  0.24 |    0.00 |      - |         - |          NA |

Tests are only for slow paths and only for little-endian processors.

New constructor is 10 times faster on my computer.
New ToByteArray is a little faster on my computer.
New TryWriteBytes is 5 times faster on my computer.

Source code https://github.com/AlexRadch/Temp/tree/Guid_BigLittleEndian_Bench

[tannergooding]

Thanks! I didn't see those results anywhere in the comments for this PR when I looked. I must have missed them.