Fix GH-10011 (Trampoline autoloader will get reregistered and cannot be unregistered)

There are two issues to resolve:
1. The FCC is not refetch when trying to unregister a trampoline

Fix GH-10011 (Trampoline autoloader will get reregistered and cannot be unregistered)

There are two issues to resolve:
1. The FCC is not refetch when trying to unregister a trampoline
2. Comparing the function pointer of trampolines is meaningless as they are reallocated, thus we need to compare the name of the function

Found while working on GH-8294

Closes GH-10033

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