[LLDB] Run API tests with PDB too (#149305)

From
https://github.com/llvm/llvm-project/pull/148554#issuecomment-3083261858
- this adds an option for API tests to be run with the both PDB readers
on Windows. As there are a lot of failures with PDB, this is an opt-in
per test.

To get PDB, `-g -gcodeview` has to be used on Clang. `-gcodeview` alone
isn't enough, because it won't cause clang to pass `-debug` to the
linker.

#149498 tracks the (currently) failing tests.

GitOrigin-RevId: 5be12e1c95e897a9da713d49255868eea7ad60fa