Merge branch 'release-v1.53'

.ci/scripts/test_old_deps.sh

.github/workflows/tests.yml

CHANGES.md

README.rst

debian/changelog

docs/MSC1711_certificates_FAQ.md

docs/SUMMARY.md

docs/admin_api/media_admin_api.md

docs/admin_api/user_admin_api.md

docs/development/releases.md

docs/modules/password_auth_provider_callbacks.md

docs/sample_config.yaml

docs/structured_logging.md

docs/upgrade.md

docs/workers.md

mypy.ini

scripts-dev/build_debian_packages

scripts/synapse_port_db

scripts/update_synapse_database

synapse/__init__.py