Consolidated some text utils into the utils_tests test package.
Factored create_fk_sql, create_unique_sql, and delete_constraint_sql.
Fixed #23065 -- Quoted constraint names in SQL generated by migrations.
Fixed #23503 -- Fixed renaming of model with self-referential m2m field.
Made get_table_list return a TableInfo named tuple
Fixed #18782 -- Prevented sql_flush to flush views

Thanks rodolfo_3 for the report and the initial patch, and
Josh Smeaton, Shai Berger and Tim Graham for the reviews.
Called table_names instead of get_table_list in migrations
Consolidated some many_to_one tests.
Fixed #23550 -- Normalized get_queryset() of RelatedObjectDescriptor
and ReverseSingleRelatedObjectDescriptor so they actually return QuerySet
instances.

Also ensured that SingleRelatedObjectDescriptor.get_queryset() accounts
for use_for_related_fields=True.

This cleanup lays the groundwork for #23533.

Thanks Anssi Kääriäinen for the review.
Skipped a broken geoapp test on Oracle; refs #23504.
Added an Oracle workaround for a geogapp test; refs #23504.