[clang] [llvm] Revert "Move python binding tests to lit framework" (PR #149012)

llvm-ci wrote: LLVM Buildbot has detected a new failure on builder `premerge-monolithic-linux` running on `premerge-linux-1` while building `.github,clang` at step 7 "test-build-unified-tree-check-all". Full details are available at: https://lab.llvm.org/buildbot/#/builders/153/builds/38284

[clang] [llvm] Revert "Move python binding tests to lit framework" (PR #149012)

llvm-ci wrote: LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-fast` running on `sanitizer-buildbot4` while building `.github,clang` at step 2 "annotate". Full details are available at: https://lab.llvm.org/buildbot/#/builders/169/builds/13025 Here is the relevan