[clang] Fix CTAD not work for function-type and array-type arguments. (#78159)

Fixes https://github.com/llvm/llvm-project/issues/51710.

When transforming a constructor into a corresponding deduction guide,
the decayed types (function/array type) were not handled properly which
made clang fail to compile valid code. The patch teaches clang handle
these decayed type in the transformation.