Update synapse_port_db for new sequences

[vanguacamolie]

This makes sure we that the port script sets up the application_services_txns sequence (#12209). and the un_partial_stated_event_stream_sequence sequence (#14545), which fixes errors like the one below from appearing when trying to connect to the postgresql database after running the script:

Postgres sequence 'application_services_txn_id_seq' is inconsistent with associated
table 'application_services_txns'. This can happen if Synapse has been downgraded and
then upgraded again, or due to a bad migration.

To fix this error, shut down Synapse (including any and all workers)
and run the following SQL:

    SELECT setval('application_services_txn_id_seq', (
        SELECT GREATEST(MAX(txn_id), 0) FROM application_services_txns
    ));

See docs/postgres.md for more information.

Pull Request Checklist

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[clokep]

I think this will fix the mypy issue:

Suggested change

	def r(txn: LoggingTransaction) -> None:
	txn.execute(
	"ALTER SEQUENCE application_services_txn_id_seq RESTART WITH %s",
	(curr_tnx_id + 1,),
	)
	if curr_tnx_id is not None:
	await self.postgres_store.db_pool.runInteraction(
	"_setup_application_services_sequence",
	r,
	)
	if curr_tnx_id is not None:
	def r(txn: LoggingTransaction) -> None:
	txn.execute(
	"ALTER SEQUENCE application_services_txn_id_seq RESTART WITH %s",
	(curr_tnx_id + 1,),
	)
	await self.postgres_store.db_pool.runInteraction(
	"_setup_application_services_sequence",
	r,
	)

[clokep]

Is this ever really None since we have the coalesce?

[clokep]

@vanguacamolie Are you interested in updating this branch? If not, can you mark it as allowing edits by maintainers?

[clokep]

#16043 is a simpler version of this.