This test was taking around 20-25 minutes to complete on Arm 32 bit.
https://reviews.llvm.org/D144259 appears to have increased that even
more which pushed us over the 25 minute timeout for CI.
Even on AArch64 the test took 18 minutes and it took 14 minutes on
the generic clang-15 bot.
I've split the test into 4 parts to bring it down to about 5 minutes
per test on Arm 32.
We could split it further but at that point we should be looking
at generating the whole set of files instead.
clang-format not found in user’s local PATH; not linting file.