[MKLDNN] Replace pooling algorithm `pooling_avg` with `pooling_avg_exclude_padding` for future oneDNN upgrades (#87851)
**Description**
Replace pooling algorithm `pooling_avg` with `pooling_avg_exclude_padding` in implementation of mkldnn pooling. It's only a change of names, not algorithm. The former is an alias of the latter and it will be removed in future oneDNN library upgrades.
This change has no effect on functionality or performance.
**Validation**
Covered by UT.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87851
Approved by: https://github.com/jgong5, https://github.com/XiaobingSuper
