feat: remove flow cookie #1586

Job	Run time
Generate SDKs	2m 23s
Run OIDC conformity tests	12m 36s
Run HSM tests	9m 55s
Run end-to-end tests (memory)	6m 47s
Run tests and lints	16m 58s
Run end-to-end tests (memory, --jwt)	9m 3s
Run end-to-end tests (postgres)	7m 26s
Run end-to-end tests (postgres, --jwt)	7m 8s
Run end-to-end tests (mysql)	8m 19s
Run end-to-end tests (mysql, --jwt)	7m 53s
Run end-to-end tests (cockroach)	7m 50s
Run end-to-end tests (cockroach, --jwt)	7m 51s
Build CLI docs	1m 50s
Generate changelog	0s
Generate release	0s
Release SDKs	0s
Draft newsletter	0s
Render version schema	0s
Send newsletter	0s
Pending approval Slack notification	0s
	1h 45m 59s

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