Update claims instead of overwrite from webhook response #2030

Job	Run time
Run OIDC conformity tests	5m 12s
Generate SDKs	4m 23s
Run HSM tests	40s
Run tests and lints	34s
Run end-to-end tests (memory)	29s
Run end-to-end tests (memory, --jwt)	30s
Run end-to-end tests (postgres)	42s
Run end-to-end tests (postgres, --jwt)	42s
Run end-to-end tests (mysql)	31s
Run end-to-end tests (mysql, --jwt)	33s
Run end-to-end tests (cockroach)	31s
Run end-to-end tests (cockroach, --jwt)	43s
Build CLI docs	1s
Generate changelog	1s
Generate release	1s
Release SDKs	1s
Render version schema	1s
Draft newsletter	1s
Pending approval Slack notification	1s
Send newsletter	1s
	15m 38s

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