Update to Django 4.2

[timgraham]

• Update signature of SchemaEditor._collate_sql() per https://github.com/django/django/commit/ae0899be0d787fbfc5f5ab2b18c5a8219d822d2b
• Update DatabaseIntrospection.get_table_description() to use display_size rather than internal_size per https://github.com/django/django/commit/cbc0fb370583c6371eb2901f752ce286f008a6a4.
• Add support for comments on columns and tables per https://github.com/django/django/commit/78f163a4fb3937aca2e71786fbdd51a0ef39629e