[lldb][test] Skip global module cache on Arm/AArch64 Linux (again)
This reverts commit
01c4ecb7ae21a61312ff0c0176c0ab9f8656c159,
d14d52158bc444e2d036067305cf54aeea7c9edb and
a756dc4724a279d76898bacd054a04832b02caa8.
This removes the logging and workaround I added earlier,
and puts back the skip for Arm/AArch64 Linux.
I've not seen it fail on AArch64 since, but let's not create
more noise if it does.
I've written up the issue as https://github.com/llvm/llvm-project/issues/76057.
It's something to do with trying to destroy a process while
a thread is doing a single sep. So my workaround wouldn't have
worked in any case. It needs a more involved fix.