[WCF]: Actually fix #22179 to allow concurrent requests.

Pass the 'OperationContext' around in a parameter instead of storing it
in an instance field to make this thread-safe.
[runtime] Fix the linux build.
Fix the linux build.
[jit] Store the epilog length in MonoArchEHJitInfo instead of encoding it in jinfo->unwind_desc, since the latter can overflow for methods with large epilogs. Fixes #22685.
Fix a warning.
[gsharedvt] Allow the SIZEOF opcode in gsharedvt code if it doesn't reference a gsharedvt type. Fixes #22711.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	mono/utils/mono-threads-linux.c