Use TypeDecl instead of QualType in reflection

[yesmanchyk]

Compiles code from https://godbolt.org/z/G6fcfoGbr but fails the regression tests

Although with reverted commit I'm still getting one Reflection test failed:

Failed Tests (1):
  Clang :: Reflection/splice-exprs.cpp


Testing Time: 0.82s

Total Discovered Tests: 16
  Passed: 15 (93.75%)
  Failed:  1 (6.25%)