Mitigation for a GC Stress race after an inline pinvoke (#38246)

Mitigation for a GC Stress race after an inline pinvoke (#38246)

In the post-call part of a pinvoke inline call frame, it's not safe
to start a stress mode GC in the window between checking
`g_TrapReturningThreads` and the call to `CORINFO_HELP_STOP_FOR_GC`.

The call instruction is already getting special treatement, but there may
be other instructions between the check and call. Instead of trying
to pattern match them all, suppress GC stress if `g_TrapReturningThreads`
is true, the thread is in cooperative mode, and there's an active inline
call frame.

Closes #37236.