Load: Containerize project_name on load to allow managing containers from different projects

[BigRoy]

Changelog Description

Maya imprint and update with project_name on container object.

Additional review information

Should be tested together with PR ynput/ayon-core#1005

Note that this would only set project name on update for ReferenceLoader plug-ins and not the other, so that would still be TODO. However, that'd only be relevant when opening a scene from another project OR when being able to 'switch asset' to another project.

Testing notes:

1. Use with PR Load and manage products from a library project ayon-core#1005
2. Load containers from library project into current project.
3. They should be manageable via the scene inventory.

OR alternatively:

1. Load containers from current project.
2. Save workfile.
3. Launch maya from another project - secretly open the file from the first project.
4. It should list and manage the containers just fine in the scene inventory because it now knows about its project.

[iLLiCiTiT]

I'd say this needs validation of @antirotor . But if we do want to support per project loading, then, yes?