[wasm] Fix interpreter crash with MethodImpl .override on PortableEntryPoints

Resolve MethodImpl overrides in getCallInfo for direct calls when
FEATURE_PORTABLE_ENTRYPOINTS is enabled. On non-WASM, this resolution
happens in getFunctionEntryPoint via MapMethodDeclToMethodImpl, but
that function is not available with portable entry points. Adding
the resolution to getCallInfo ensures the interpreter compiler
receives the correct target MethodDesc at compile time.

This fixes a crash where a non-virtual call to a MethodImpl-overridden
method (e.g. call instance MyBar::DoBar() with .override pointing to
DoBarOverride) would target the wrong method, leading to uninitialized
interpreter code.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: radekdoulik

src/coreclr/vm/jitinterface.cpp

@@ -5372,6 +5372,20 @@ void CEEInfo::getCallInfo(
 #endif // STUB_DISPATCH_PORTABLE
     }
 
+#ifdef FEATURE_PORTABLE_ENTRYPOINTS
+    // On portable entry points, getFunctionEntryPoint is not available to resolve MethodImpl
+    // overrides. Do the resolution here so the interpreter compiler gets the right target
+    // method for non-virtual calls to MethodImpl-overridden methods.
+    if (directCall)
+    {
+        MethodDesc* pResolvedMD = MethodTable::MapMethodDeclToMethodImpl(pTargetMD);
+        if (pResolvedMD != pTargetMD)
+        {
+            pTargetMD = pResolvedMD;
+        }
+    }
+#endif // FEATURE_PORTABLE_ENTRYPOINTS
+
     pResult->hMethod = CORINFO_METHOD_HANDLE(pTargetMD);
 
     pResult->accessAllowed = CORINFO_ACCESS_ALLOWED;