Fix tagger image

[sarah-witt]

What does this PR do?

Fixes tagger image.

Tagger image is failing to build due to:

#20 1.202 error: externally-managed-environment
#20 1.202 
#20 1.202 × This environment is externally managed
#20 1.202 ╰─> To install Python packages system-wide, try apt install
#20 1.202     python3-xyz, where xyz is the package you are trying to
#20 1.202     install.
#20 1.202 

now that we are using ubuntu 25.04: #23212

Additionally, this pulls the python image from our mirror so we avoid getting rate limited

Motivation

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 0053acd28d

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[github-actions]

⚠️ Recommendation: Add qa/skip-qa label

This PR does not modify any files shipped with the agent.

To help streamline the release process, please consider adding the qa/skip-qa label if these changes do not require QA testing.

[sarah-witt]

@codex review

Review from Kyle-Neale is dismissed. Related teams and files:

• agent-integrations
  • .gitlab/tagger/Dockerfile