chore(ci): try to optimize disk space when tagging latest

[mudler]

Description

This PR try to fix issues when tagging latest images that consumes too much disk space in the worker

Notes for Reviewers

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[Copilot]

Pull Request Overview

This PR optimizes disk usage when tagging the “latest” container images by leveraging the build-push-action’s load feature and removing redundant docker pull steps.

• Conditionally adds load: true to build-push steps when tagging on a Git tag.
• Removes explicit docker pull commands before re-tagging versioned images.
• Applies the same optimization to both the main image and backend workflows.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/image_build.yml	Added load flags to reduce local pulls and removed redundant pulls
.github/workflows/backend_build.yml	Added load flag for backend build and removed redundant pulls

Comments suppressed due to low confidence (2)

.github/workflows/image_build.yml:331

• Ensure that the build-push-action load: true actually loads both the localai and quay.io versioned images into the local Docker daemon before this tag step; otherwise, docker tag may fail on missing images. If not, consider re-adding a pull or splitting builds per registry.

          docker tag localai/localai:${{ steps.meta.outputs.version }} localai/localai:${{ inputs.latest-image }}

.github/workflows/backend_build.yml:244

• Verify that the load: true option in the build step loads the backend image locally; if it doesn’t, this docker tag will fail. Otherwise, you may need to restore an explicit pull or adjust the build step.

          docker tag localai/localai-backends:${{ steps.meta.outputs.version }} localai/localai-backends:${{ inputs.latest-image }}