[s390x] add in-process crash reporter for s390x

[saitama951]

Fixes #131535 for linux-s390x, #131604 introduced a build error

  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:62:2: error: "Unsupported arch"
     62 | #error "Unsupported arch"
        |  ^
  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:89:1: error: expected expression
     89 | struct StackOverflowTraceFrame
        | ^
  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:102:5: error: unknown type name 'StackOverflowTraceFrame'; did you mean 'StackOverflowTraceSnapshot'?
    102 |     StackOverflowTraceFrame frames[CRASHREPORT_STACK_OVERFLOW_MAX_TRACE_FRAMES];
        |     ^~~~~~~~~~~~~~~~~~~~~~~
        |     StackOverflowTraceSnapshot


....

  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:1245:6: error: "Unsupported arch"
   1245 |     #error "Unsupported arch"
        |      ^
  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:1258:12: error: use of undeclared identifier 'CRASH_MCREG_PC'
   1258 |     return CRASH_MCREG_PC(ucontext);
        |            ^
  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:1271:12: error: use of undeclared identifier 'CRASH_MCREG_SP'
   1271 |     return CRASH_MCREG_SP(ucontext);
        |            ^
  /home/sanjam/runtime/src/coreclr/debug/crashreport/inproccrashreporter.cpp:1284:12: error: use of undeclared identifier 'CRASH_MCREG_FP'
   1284 |     return CRASH_MCREG_FP(ucontext);

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[uweigand]

Looks good except for the frame pointer register.

[saitama951]

cc: @am11 @jkotas

[azure-pipelines]

Azure Pipelines:
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[am11]

LGTM, lets add ppc64le as well while at it.

[saitama951]

done

[am11]

Note that we need changes from #131700 as well to make it actually recognize the HAVE_ macros. Those platforms produce different results than linux and others.

[jkotas]

/ba-g infrastructure timeouts