any_invocable_test: Re-enable the two conversion tests that used to fail under MSVC
any_invocable_test: Re-enable the two conversion tests that used to fail under MSVC

PiperOrigin-RevId: 461238101
Change-Id: Id3edac104ecd9edd9daf8012894a62692bd9569f

abseil/abseil-cpp,abseil/abseil-cpp,abseil/abseil-cpp,abseil/abseil-cpp