8208677: Move inner metaspace cleaning out of class unloading

Move to safepoint cleanup actions to do if needed.

Reviewed-by: eosterlund, hseigel

src/hotspot/share/code/nmethod.cpp

@@ -1540,6 +1540,7 @@ void nmethod::metadata_do(void f(Metadata*)) {
         }
       } else if (iter.type() == relocInfo::virtual_call_type) {
         // Check compiledIC holders associated with this nmethod
+        ResourceMark rm;
         CompiledIC *ic = CompiledIC_at(&iter);
         if (ic->is_icholder_call()) {
           CompiledICHolder* cichk = ic->cached_icholder();