Release code freeze: Slack notification skipped if failures during smoke tests

[jbordonado]

Describe the bug

Release code freeze workflow: https://github.com/Automattic/woocommerce-payments/blob/develop/.github/workflows/release-code-freeze.yml

If there are any failures during the Raise a PR to trunk job, then the Send notification to Slack job is skipped.

We still want a Slack notification in this case, and it should be doable by using the proper status check function in if conditionals