ci: explicitly give write permissions to packages (cherry-pick #7428) #15095

Job	Run time
lint (bandit)	2m 12s
lint (black)	1m 31s
lint (codespell)	1m 24s
lint (isort)	2m 53s
lint (pending-migrations)	1m 45s
lint (pylint)	3m 17s
test-migrations	1m 54s
lint (pyright)	2m 12s
test-unittest - PostgreSQL 12-alpine	7m 46s
test-migrations-from-stable	10m 5s
test-unittest - PostgreSQL 15-alpine	11m 48s
lint (ruff)	2m 0s
test-unittest - PostgreSQL 16-alpine	8m 13s
test-integration	4m 30s
test-e2e (proxy)	5m 17s
test-e2e (oauth)	6m 28s
test-e2e (oauth-oidc)	6m 15s
test-e2e (saml)	4m 3s
test-e2e (ldap)	8m 7s
test-e2e (radius)	3m 53s
test-e2e (flows)	5m 11s
ci-core-mark	1s
build-arm64	34m 12s
build	11m 59s
	2h 26m 56s

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