Snapshot schema 72 (#13873)

changelog.d/13873.misc

scripts-dev/make_full_schema.sh

synapse/storage/database.py

synapse/storage/engines/_base.py

synapse/storage/engines/postgres.py

synapse/storage/engines/sqlite.py

synapse/storage/prepare_database.py

...e/storage/schema/common/full_schemas/72/full.sql.postgres

...pse/storage/schema/common/full_schemas/72/full.sql.sqlite

...pse/storage/schema/main/full_schemas/72/full.sql.postgres

synapse/storage/schema/main/full_schemas/72/full.sql.sqlite

...se/storage/schema/state/full_schemas/72/full.sql.postgres

synapse/storage/schema/state/full_schemas/72/full.sql.sqlite