clang-tidy: Avoid spawning too many threads

The clang-tidy-fix target uses run-clang-tidy to do the fixing, however
this script itself spawns `os.cpu_count()` threads as part of its
internal parallelism. When combined with Meson's parallelism this
results in the creation of potentially thousands of unecessary threads.

This commit rewrites the clang-tidy-fix to perform the same task
run-clang-tidy does but exclusively on Meson's thread pool. "Fix-it"
snippets are saved to `meson-private/clang-tidy-fix/` by a parallel
clang-tidy phase, afterwards (to avoid races) all collected fixes are
applied with a single call to clang-apply-replacements.

0 files changed, 0 insertions, 0 deletions