Fix Synapse git info missing in version strings (#12973)

changelog.d/12973.bugfix

poetry.lock

pyproject.toml

synapse/__init__.py

synapse/_scripts/synapse_port_db.py

synapse/_scripts/update_synapse_database.py

synapse/app/_base.py

synapse/app/admin_cmd.py

synapse/app/generic_worker.py

synapse/app/homeserver.py

synapse/config/logger.py

synapse/federation/transport/server/federation.py

synapse/metrics/__init__.py

synapse/rest/admin/__init__.py

synapse/util/__init__.py