`qiskit.primitives.containers` classes not built in docs

[samanthavbarron]

URL, if applicable

No response

Describe the new content you are requesting.

The classes defined in qiskit.primitives.containers have docstrings, but are not built in the documentation since they are not included here.

It would be useful to build the docs for these classes so information about them is more accessible.

PR for this https://github.com/Qiskit/qiskit/pull/13564

If this new content request is accepted, do you want to write the content?

no

[abbycross]

Removing from our board since it's being resolved on the Qiskit/qiskit side (feel free to restore if it belongs here)