fix(docker): Improve Dockerfile cache use by making build commands match exactly

[teor2345]

Motivation

I think Docker builds are slow because the cook and build/test commands are using different settings.

Solution

Use exactly the same settings for cook and build/test
Add a TODO for --locked once it is supported

Review

This is important but not a release blocker.

We might want to merge it separately to PR #6934, so we can see the cache speed improvement. The full speed improvement won't be visible until this PR merges to main.

Reviewer Checklist

• Are the PR labels correct?
• Does the code do what the ticket and PR says?
• How do you know it works? Does it have tests?

[gustavovalverde]

I do agree with merging this, I'm just not approving yet as I'd like to see how #6934 behaves without this changes.

[gustavovalverde]

I removed the dependency on PR #6934 as it will be more complex than initially expected