[polly] [Polly] Introduce PhaseManager and remove LPM support (PR #125442)

[Michael Kruse via llvm-commits]

Meinersbur wrote:

Sorry for that. I tested it locally and it did pass. I was also taking a look on the various Polly buildbot configurations (https://lab.llvm.org/buildbot/#/workers/28, https://lab.llvm.org/buildbot/#/workers/74) but unknowingly to me, their sponsor deleted them.

https://github.com/llvm/llvm-project/pull/125442