feat: remove flow cookie #1585

Job	Run time
Run OIDC conformity tests	10m 38s
Generate SDKs	1m 42s
Run end-to-end tests (memory)	6m 56s
Run HSM tests	8m 7s
Run end-to-end tests (memory, --jwt)	7m 2s
Run tests and lints	3m 48s
Run end-to-end tests (postgres)	7m 21s
Run end-to-end tests (postgres, --jwt)	6m 45s
Run end-to-end tests (mysql)	10m 31s
Run end-to-end tests (mysql, --jwt)	7m 9s
Run end-to-end tests (cockroach)	8m 8s
Run end-to-end tests (cockroach, --jwt)	7m 29s
Build CLI docs	0s
Generate changelog	0s
Generate release	0s
Render version schema	0s
Draft newsletter	0s
Release SDKs	0s
Send newsletter	0s
Pending approval Slack notification	0s
	1h 25m 36s

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