Revert "[clang][Interp] Create full type info for dummy pointers"

This reverts commit eef5798844a6ed489c28b37113f3bcaafd1d6e68.

This breaks two tests on an arm builder:
https://lab.llvm.org/buildbot/#/builders/245/builds/23496

GitOrigin-RevId: 6195e228eb2a7085fac53603f534d2401ab1ac39
7 files changed