Add comparison tables to access-groups page

[abbycross]

No description provided.

[abbycross]

@francabrera Any feedback on where the tables are placed on the page? I've put them together near the end of the page (and I link from one of the admonition boxes to the actions table, because it is relevant) - does that make sense?

My next step will be to fill in the other columns but wanted to get them placed first.

[francabrera]

@francabrera Any feedback on where the tables are placed on the page? I've put them together near the end of the page (and I link from one of the admonition boxes to the actions table, because it is relevant) - does that make sense?

I think that's fine. Will leave some additional comments in the PR.

[qiskit-bot]

One or more of the following people are relevant to this code:

• @abbycross
• @beckykd