Fix DelayLoad_MethodCall unwinding (#17275)
Fix DelayLoad_MethodCall unwinding (#17275)

* Fix DelayLoad_MethodCall unwinding

Unwinding through DelayLoad_MethodCall was broken due to the overwriting
of R7 which is used as a frame pointer. That caused some managed
exceptions to cause abort with unhandled PAL_SEHException.

This change fixes the problem by using a different register.

* Fix one more spot with the same issue

poizan42/coreclr,mmitche/coreclr,cshung/coreclr,cshung/coreclr,poizan42/coreclr,mmitche/coreclr,cshung/coreclr,mmitche/coreclr,cshung/coreclr,cshung/coreclr,poizan42/coreclr,krk/coreclr,krk/coreclr,krk/coreclr,mmitche/coreclr,cshung/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,krk/coreclr,poizan42/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,poizan42/coreclr,krk/coreclr,poizan42/coreclr,mmitche/coreclr,mmitche/coreclr,wtgodbe/coreclr,krk/coreclr