Fixed #34841 -- Avoided rendering apps on state still requiring mutation

[shangxiao]

https://code.djangoproject.com/ticket/34841

[shangxiao]

@jarshwah, hi. Interested in checking whether this patch speeds up reverse migrations for you?

[felixxm]

@shangxiao Do you have time to keep working on this?

[shangxiao]

@shangxiao Do you have time to keep working on this?

Yep 👍

[felixxm]

@charettes Do you think this is an acceptable improvement?

[charettes]

@felixxm no objections from me, this should only cause a slowdown on custom migrations.Operation subclasses out there that use state.apps in their state_forwards as none of the core ones do anymore so I think this is a good tradeoff.