Update `ApiContentControllers::list()` to expose available content entity operations in `meta`

> Update all of our API responses (both GET individual and GET list) to provide the entity operations' link relationship for those operations that are permitted

There's no individual GET for ApiContentControllers. I don't think this should be also on auto-saved data, so this should be good now?

What a fantastic start! 🤩👏

The only failing test is because of 📌 Cypress test publish-validation is flaky Active

Very close!

Surprisingly the rebase was automatic.

Assigning Lee for reviews

penyaskito → credited mglaman → .

Looks good to me!

Couple of minor nits on the MR and one concern regarding test stability because of the use of the state api. See 🐛 Race conditions/bad lock logic in CacheCollector/State Active

Agreed with most of @larowlan's remarks, plus 1 cacheability question and 2 bits of logic simplification.

Handled all feedback.

This looks great now! 🤩

Related: #3452581-44: [META] XB Permissions → .