[compiler-rt] [compiler-rt][test] Use packaging.version.Version to compare glibc versions (PR #142596)

[Arthur Eubanks via llvm-commits]

aeubanks wrote:

this seems to have caused a couple of tests that have checks for the glibc version to start failing on our bots and I'm not sure why: https://g-issues.chromium.org/issues/444460536. still investigating

https://github.com/llvm/llvm-project/pull/142596