[clang] [libclang/python] Add python bindings for PrintingPolicy (PR #120494)

[via cfe-commits]

epistax wrote:

Should this have enabled getting fully qualified type names? From Python I am using a PrintingPolicy with the FullyQualifiedName property set, but using pretty_printed on a type name with the policy does not provide a fully qualified name.


https://github.com/llvm/llvm-project/pull/120494