Fix: Upload docker images on pypi release

[SurbhiJainUSC]

Description

When MaxText 0.2.1 was released by triggering pypi_release.yml worflow in Github, it didn't upload the docker images to GCR. The reason being pyipi_release.yml workflow is triggered by on: release. However, build_and_push_Docker_images.yml workflow has a conditional check that allows job to run only for "schedule", "pull_request", or "workflow_dispatch". Since release is not listed in that if: condition, the job evaluates to false and skips immediately: https://github.com/AI-Hypercomputer/maxtext/actions/runs/23462478704/job/68272569186

Tests

https://github.com/AI-Hypercomputer/maxtext/actions/runs/23502503748

Checklist

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• I have performed a self-review of my code. For an optional AI review, add the gemini-review label.
• I have necessary comments in my code, particularly in hard-to-understand areas.
• I have run end-to-end tests tests and provided workload links above if applicable.
• I have made or will make corresponding changes to the doc if needed, including adding new documentation pages to the relevant Table of Contents (toctree directive) as explained in our documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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