Fix ingress dry run desired state

[cbusillo]

Summary

• keep ingress dry-run workflow under GitHub's 10-input workflow_dispatch limit
• route all optional desired-state and request-control fields through route_options_json
• preserve explicit false values for request controls and route toggles with jq has(...)

Tests

• git diff --check
• uv run --extra dev ruff check tests/test_product_onboarding.py --diff
• uv run --extra dev ruff check tests/test_product_onboarding.py
• uv run python -m unittest tests.test_product_onboarding
• jq payload regression for explicit false controls/toggles and identity_access
• docker run --rm -v "$PWD:/repo" -w /repo rhysd/actionlint:1.7.7 -config-file .github/actionlint.yaml .github/workflows/ingress-route-dry-run.yml

Refs #1065
Refs #1051