feat: re-enable legacy client IDs #1556

Job	Run time
Run OIDC conformity tests	40m 30s
Generate SDKs	1m 58s
Run end-to-end tests (memory)	8m 9s
Run end-to-end tests (memory, --jwt)	8m 29s
Run end-to-end tests (postgres)	8m 26s
Run end-to-end tests (postgres, --jwt)	8m 28s
Run end-to-end tests (mysql)	8m 30s
Run end-to-end tests (mysql, --jwt)	8m 28s
Run end-to-end tests (cockroach)	8m 30s
Run end-to-end tests (cockroach, --jwt)	8m 27s
Run tests and lints	1m 42s
Run HSM tests	4m 43s
Build CLI docs	0s
Generate changelog	0s
Generate release	1s
Render version schema	1s
Release SDKs	1s
Draft newsletter	1s
Pending approval Slack notification	1s
Send newsletter	1s
	1h 56m 26s

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