Convert add-on review list to sagas

[kumar303]

Instead of using async-connect to pre-load data for the add-on review listing, we should use a saga.

Steps to test for regressions:

• Load an add-on detail page for an add-on that has reviews
• Click 'Read N reviews'
• Make sure the review listing still works

This is a step towards #10365

[vcarciu]

@kumar303 : Please let me know if this is ok and will be solved in another issue, or this should be reopened:

[kumar303]

Hi @vcarciu , your screencast looks right. What were you expecting to happen that should be solved in another issue? Thanks for testing it out.