feat: re-enable legacy client IDs #1550

Job	Run time
Run OIDC conformity tests	14m 40s
Generate SDKs	1m 58s
Run tests and lints	16m 5s
Run end-to-end tests (memory)	7m 51s
Run end-to-end tests (memory, --jwt)	9m 37s
Run end-to-end tests (postgres)	7m 19s
Run end-to-end tests (postgres, --jwt)	8m 25s
Run end-to-end tests (mysql)	7m 4s
Run end-to-end tests (mysql, --jwt)	6m 44s
Run end-to-end tests (cockroach)	8m 28s
Run end-to-end tests (cockroach, --jwt)	9m 0s
Run HSM tests	9m 23s
Build CLI docs	1m 24s
Generate changelog	0s
Generate release	0s
Render version schema	0s
Release SDKs	0s
Draft newsletter	0s
Pending approval Slack notification	0s
Send newsletter	0s
	1h 47m 58s

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