[ASan] Make most tests run under internal shell on Darwin
This patch fixes most of the ASan tests that were failing on Darwin when
running under the internal shell. There are still a couple left that
are more interesting cases that I'll do in a follow up patch. The
tests that still need to be done:
```
TestCases/Darwin/duplicate_os_log_reports.cpp
TestCases/Darwin/dyld_insert_libraries_reexec.cpp
TestCases/Darwin/interface_symbols_darwin.cpp
```
Reviewers: thetruestblue, fhahn, vitalybuka, DanBlackwell, ndrewh
Reviewed By: DanBlackwell
Pull Request: https://github.com/llvm/llvm-project/pull/168545
