Chore: Fix typo and typhint in get representations

[iLLiCiTiT]

Changelog Description

Define correct typehint for names_by_version_ids and fix typo representaion_names_filter > representation_names_filter.

Testing notes:

1. Verify changes.

[BigRoy]

Aside of grammar - the changes look ok. (I didn't do a test run.)

However...
However, I did want to note. Are we sure names_by_version_ids does what we want?

Passing for example:

names_by_version_ids = {
  "versionid1": ["ma", "abc"],
  "versionid2": ["exr"]
}

Are we sure the result does not include exr also for versionid1? I can't seem to find directly inside the code what makes it filter PER version id since it looks like we're just constructing a query for "representationNames" and "versionIds" and never a filter that filters representation names PER version id?

[iLLiCiTiT]

Are we sure the result does not include exr also for versionid1? I can't seem to find directly inside the code what makes it filter PER version id since it looks like we're just constructing a query for "representationNames" and "versionIds" and never a filter that filters representation names PER version id?

No, btw there is todo:

            Add separated function for 'names_by_version_ids' filtering.
            Because can't be combined with others.

This argument was added because of backwards compatibility with OpenPype openpype.client if I remember correctly and may be irrelevant now. Question is if we need the functionality (and if is used anywhere?).