Property `TPUSpawnPlugin.tpu_global_core_rank` may be replaced by global rank property

[awaelchli]

Proposed refactor

Deprecate tpu_global_core_rank in favor of global_rank.

Pitch

It "looks" like tpu_global_core_rank in the TPUPlugin is just another name for what is known as the global rank. After #10896 we should investigate whether the two are equivalent and revert back to using the unified global_rank property exclusively.

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cc @Borda @kaushikb11 @rohitgr7 @justusschock @awaelchli @akihironitta @tchaton

[kaushikb11]

Yup, let's go ahead with the deprecation!

[stale]

This issue has been automatically marked as stale because it hasn't had any recent activity. This issue will be closed in 7 days if no further activity occurs. Thank you for your contributions, Pytorch Lightning Team!