Custom staging dir functionality migration

[jakubjezek001]

Changelog Description

The functionality of the staging directory has exceeded its original purpose of publishing. Considering its increased usage in the creation process, we need to migrate it to a dedicated module within the pipeline parent.

Additional info

Migrated development from https://github.com/ynput/OpenPype/pull/5207

• adding functionality to Creator base class
• consistency of naming across all features
• making sure backward compatibility to older names and locations remain in settings and api
• anatomy templates with Staging Dir category

Testing notes:

1. all should be working as it was before