Add the new Matrix v1.11 media worker endpoints #713

Job	Run time
Dendrite: SQLite	5m 7s
Synapse: Py 3.8, SQLite 3.31.1, Monolith	8m 12s
Dendrite: Postgres	6m 41s
Synapse: Py 3.8, PG 12, Monolith	9m 58s
Synapse: Py 3.8, PG 12, Workers	13m 31s
Synapse: Py 3.10, PG 14, Monolith	14m 14s
Synapse: Py 3.10, PG 14, Workers	18m 12s
Synapse: debian-testing, Monolith	10m 22s
Synapse: debian-testing, Workers	14m 43s
	1h 41m 0s

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