Support MSC4222 `state_after` #10150

Job	Run time
Run Complement Crypto tests	0s
Downstream test element-web	0s
Jest [integ] (Node lts/*)	2m 24s
Jest [integ] (Node 22)	2m 22s
Jest [unit] (Node lts/*)	1m 36s
Jest [unit] (Node 22)	1m 36s
Downstream tests	2s
Downstream Complement Crypto tests	1s
Jest tests	1s
	8m 2s

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