[CoreCLR] UnsafeAccessorAttribute: Missing static modifier check for field

[fanyang-mono]

CoreCLR missed the check for when UnsafeAccessorKind is set to Field, the corresponding field shouldn't be static and vice/versa.

A new testcase was added in #88626 and it failed on CoreCLR.

Re-enable test: Verify_InvalidTargetUnsafeAccessor upon fixing this issue.

[AaronRobinsonMSFT]

I believe this is an issue in the newly added test. See https://github.com/dotnet/runtime/pull/88626/files#r1262953624

[AaronRobinsonMSFT]

Closing based on #88626 (comment)