General: Move subset name functionality

[iLLiCiTiT]

Brief description

Moved functions related to subset names into openpype.pipeline.create.

Description

Functions get_subset_name and get_subset_name_with_asset_doc in openpype.lib are marked as deprecated. Both are calling new function in openpype.pipeline.create.subset_name called get_subset_name which is copy of get_subset_name_with_asset_doc.

Additional info

Because get_subset_name is not used it was not added to new location at all and get_subset_name_with_asset_doc was renamed to get_subset_name. New function can expect project settings to make calculations faster.

I moved the logic under "create" category because it is used for instance creation. But it's also used in publish plugins when instances are "auto-created" (which is still technically creation?).

I've named the file subset_name.py because I didn't know where elso to put it. I think it's more lib function for creation because at the end subset name is defined by creators. Let comments if you agree with having subset_name.py or use different file. At this moment is content not directly imported so it would be easy to change.

Testing notes:

1. Creation of instances should work in any host and subset name should be filled correctly.

[ynbot]

Task linked: OP-3819 Move subset name functionality

[64qam]

Tested in Nuke, PS, AE

[BigRoy]

I had to change that PR title because - oh boy - I read that the wrong way.