Invalidate CI cache when bumping dependencies

[frenck]

Proposed change

Second attempt to fix our CI issues, the first attempt in #62383.

While #62383 worked for a couple of hours, we are already experiencing the same issue again. At the moment of writing, it seems that only PRs bumping a dependency are affected.

This PR changes the behavior of the venv a little bit. Instead of restoring an venv and upgrading the package, it rebuilds the full venv now.

A performance drop in the CI will be noticeable, as it takes 13-15 minutes to set up a fresh venv; However, this would only affect PRs and merged to dev that includes dependency bumps.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
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