GC stackwalking crashing on calli with generics

[jkotas]

From #95565 (comment)

Running RunGenericFunctionPointerTest...
Testing GenericCalli with int as the return type

Assert failure(PID 4248 [0x00001098], Thread: 1976 [0x07b8]): CONTRACT VIOLATION by operator new at "D:\a\_work\1\s\src\coreclr\utilcode\clrhost_nodependencies.cpp":301

THROWS called in a NOTHROW region.

VIOLATED-->  CONTRACT in MetaSig::GetElemSize at "D:\a\_work\1\s\src\coreclr\vm\siginfo.cpp":2598
                        FAULT_FORBID in ScanStackRoots at "D:\a\_work\1\s\src\coreclr\vm\gcenv.ee.cpp":128
                        GCX_NOTRIGGER in ScanStackRoots at "D:\a\_work\1\s\src\coreclr\vm\gcenv.ee.cpp":128
                        CANNOTTHROW in ScanStackRoots at "D:\a\_work\1\s\src\coreclr\vm\gcenv.ee.cpp":128
                        CONTRACT in GetILStubForCalli at "D:\a\_work\1\s\src\coreclr\vm\dllimport.cpp":5991
                        CONTRACT in MethodDescCallSite::CallTargetWorker at "D:\a\_work\1\s\src\coreclr\vm\callhelpers.cpp":280
                        GCX_COOP in Assembly::ExecuteMainMethod at "D:\a\_work\1\s\src\coreclr\vm\assembly.cpp":1409
                        CONTRACT in Assembly::ExecuteMainMethod at "D:\a\_work\1\s\src\coreclr\vm\assembly.cpp":1395
                        GCX_COOP in CorHost2::ExecuteAssembly at "D:\a\_work\1\s\src\coreclr\vm\corhost.cpp":329
                        CONTRACT in CorHost2::ExecuteAssembly at "D:\a\_work\1\s\src\coreclr\vm\corhost.cpp":269


000000b8`0a5769e0 00007ffb`29614f4c KERNELBASE!RaiseFailFastException+0xae
000000b8`0a576fb0 00007ffb`296147f5 coreclr!_DbgBreakCheck+0x2ec
000000b8`0a578120 00007ffb`296149ff coreclr!_DbgBreakCheckNoThrow+0x55
000000b8`0a5781d0 00007ffb`28df3810 coreclr!DbgAssertDialog+0x1af
000000b8`0a5782f0 00007ffb`295d16ae coreclr!CONTRACT_ASSERT+0x320
(Inline Function) --------`-------- coreclr!ClrDebugState::CheckOkayToThrow+0x40
(Inline Function) --------`-------- coreclr!RealCLRThrowsExceptionWorker+0x81
000000b8`0a57b9c0 00007ffb`295d839e coreclr!operator new+0x9e
000000b8`0a57ba10 00007ffb`29096670 coreclr!ThrowHR+0x7e
000000b8`0a57ba90 00007ffb`28e038b1 coreclr!MetaSig::GetElemSize+0x220
000000b8`0a57bb60 00007ffb`28f5a41c coreclr!ArgIteratorTemplate<ArgIteratorBase>::GetNextOffset+0x141
000000b8`0a57bb90 00007ffb`28f56dfa coreclr!TransitionFrame::PromoteCallerStackHelper+0x1ac
(Inline Function) --------`-------- coreclr!`::PromoteCallerStack+0xdb
000000b8`0a57bc40 00007ffb`291dfe01 coreclr!PInvokeCalliFrame::GcScanRoots+0xfa
000000b8`0a57bd10 00007ffb`290a7354 coreclr!GcStackCrawlCallBack+0x471
(Inline Function) --------`-------- coreclr!Thread::MakeStackwalkerCallback+0x72
000000b8`0a57bf10 00007ffb`290a703f coreclr!Thread::StackWalkFramesEx+0x274
000000b8`0a57c320 00007ffb`291de7a4 coreclr!Thread::StackWalkFrames+0x17f
000000b8`0a57d450 00007ffb`291dbff7 coreclr!ScanStackRoots+0x254
000000b8`0a57d620 00007ffb`2955d2ca coreclr!GCToEEInterface::GcScanRoots+0x197
000000b8`0a57d670 00007ffb`29552888 coreclr!WKS::gc_heap::mark_phase+0x48a
000000b8`0a57d750 00007ffb`295525fa coreclr!WKS::gc_heap::gc1+0x228
000000b8`0a57d810 00007ffb`29538463 coreclr!WKS::gc_heap::garbage_collect+0x73a
000000b8`0a57d8c0 00007ffb`29537f06 coreclr!WKS::GCHeap::GarbageCollectGeneration+0x4e3
(Inline Function) --------`-------- coreclr!WKS::GCHeap::GarbageCollectTry+0x63
000000b8`0a57d920 00007ffb`2953bbd8 coreclr!WKS::GCHeap::GarbageCollect+0x1f6
000000b8`0a57d980 00007ffb`291954aa coreclr!WKS::GCHeap::StressHeap+0x718

[jkotas]

Introduced by #97079

cc @hez2010