Investigate to see if we can speed up CICD for push events

It can take 15 - 20 minutes for a push to a PR to result in a commit being available to deploy in Riffraff for the CODE environment. This can be quite disruptive as it's quite a long time to wait to get feedback on a change that needs to be tested in the environment.

This issue is to investigate if we can sensibly split up the CICD runs, or have an early deployment option, so that we can deploy to the CODE environment faster.

This should not result in a solution that compromises the stability of the main branch, so steps should be taken to ensure that the Github workflows continue to prevent bugs reaching the PROD environment.
```[tasklist]
### Tasks
- [ ] https://github.com/guardian/dotcom-rendering/issues/9465
- [ ] investigate if we can sensibly split up the CICD runs, or have an early deployment option, so that we can deploy to the CODE environment faster.
```