[AsmParser] Remove typed pointer auto-detection

IR is now always parsed in opaque pointer mode, unless
-opaque-pointers=0 is explicitly given. There is no automatic
detection of typed pointers anymore.

The -opaque-pointers=0 option is added to any remaining IR tests
that haven't been migrated yet.

Differential Revision: https://reviews.llvm.org/D141912

GitOrigin-RevId: 9ed2f14c87174e316de03407442eed2c643f3695
89 files changed