[clang] [Sema] -Wpointer-bool-conversion: suppress lambda function pointer conversion diagnostic during instantiation (PR #83497)

[Vinayak Dev via cfe-commits]

vinayakdsci wrote:

Great catch! The usage of template instantiation didn't seem very obvious while adding the tests, and hence the missed test case.
Thanks a lot for the fix!

https://github.com/llvm/llvm-project/pull/83497