Sync models from pinecone-protos

[fsxfreak]

Problem

See context in #313. This PR also includes other changes such as renaming vector_operations_api to data_plane_api and updating documentation.

Solution

Followed steps to regenerate the python client from the protos.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: (explain here)

[jhamon]

I'm a bit puzzled why the tests did not kick off for this PR. But I would expect a few things to fail because of ManageIndexesApi getting renamed to DataPlaneApi. This class is referenced inside of pinecone/control/pinecone.py and pinecone/control/index_host_store.py which need to be changed to account for the rename.

I misread the diff because of how github presented it, although some stuff did get renamed that should require changes outside the generated directory. E.g. VectorServerApi to DataPlaneApi and delete to delete_alt. I pushed a whitespace change to trigger the tests which should hopefully highlight that change is needed; I'm not sure why they didn't run when you opened this PR.