[MPS] Fix correctness issues with Pooling ops (#91519)
- Workaround for MaxPool when ceilMode=true
- Workaround for ChannelsLast memory format
- Workaround for divisor_override in AvgPool ops
- Enabled count_include_pad parameter for AvgPool
- Refactoring and clean up of duplicate code
- Enable MaxPool tests in TestConsistency
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91519
Approved by: https://github.com/kulinseth, https://github.com/malfet
