General: Collection Audio speed up

[iLLiCiTiT]

Brief description

Speed up Collect Audio publish plugin.

Description

Collect audio did do a lot of database calls per instance which slowed down collection phase a lot if there was more instances. The plugin was converted from instance plugin to context plugin. That helps to query required data from database for all instances at once without doing it for each individual instance.

Additional info

The plugin is not using legacy_io.Session to get context information. Instead of using get_representation_path is used get_representation_path_with_anatomy.

Testing notes:

1. Create at least 10 instances each with different asset (e.g. in tray publisher)
2. Run collection
3. Compare speed with and without this PR