Bump DatabaseCreation deprecation to 2.0 (refs #22340)
Fixed #22337: FileSystemStorage marked as deconstructible and tested.
Fixed #22576: Ensure makemigrations doesn't touch the database.
Improve docs around deconstruction/serialisation (refs #22337)
Forward ported docs of security issues from df81625da6.
Updated some docs for the delayed deprecation of legacy table creation; refs #22340.
Insert space.
Fixed #22563: Better error message when trying to change AUTH_USER_MODEL

You're not allowed to do this after you've made migrations; see ticket
for more details.
Fixed #22581: Pass default values for schema through get_db_prep_save()
Fixed #22496: Data migrations get transactions again!
Merge pull request #2639 from alimony/patch-1

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