[AST] Add a print method to Introspection LocationCall

Add a print method that takes a raw_ostream.
Change LocationCallFormatterCpp::format to call that method.

Reviewed By: steveire

Differential Revision: https://reviews.llvm.org/D100423

GitOrigin-RevId: 542e7806e61089da833338a2ff467006073cbe8d
3 files changed