[zOS] Turn CLANG_INTERPRETER_PLATFORM_CANNOT_CREATE_LLJIT on for zOS (#87797)

PR
[https://github.com/llvm/llvm-project/pull/84461](https://github.com/llvm/llvm-project/pull/84461)


disabled `clang/unittests/Interpreter/InterpreterExtensionsTest.cpp` for
AIX by turning on `CLANG_INTERPRETER_PLATFORM_CANNOT_CREATE_LLJIT`.
This PR turns `CLANG_INTERPRETER_PLATFORM_CANNOT_CREATE_LLJIT` on for
zOS as well, since LLJIT cannot be created on zOS either.

Co-authored-by: Bahareh <bahareh.farhadi@ibm.com>