host: Add display of Matrix registration errors #5384

Job	Run time
Check which packages changed	0s
AI bot Tests	47s
Boxel Motion Tests	1m 1s
Boxel UI Tests	1m 22s
Host Tests	10m 31s
Lint	1m 54s
Matrix Client Tests - Group 1	4m 5s
Matrix Client Tests - Group 2	4m 39s
Realm Server Tests	4m 58s
Build host	0s
Build realm-server	0s
EFS Config	0s
deploy-ai-bot	0s
Deploy host	0s
Deploy realm server to staging	0s
	29m 17s

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