ci: Improvements on the mirror and prebuilt flow (commaai#386)

* Remove redundant git lfs pull command

The `git lfs pull` command in the GitHub workflow is redundant and has been removed. Additionally, the `sync-lfs.sh` script has been updated to push all LFS objects to the origin repository.

* using force push instead of trying to merge

* Bumping ssh agent to 0.9.0

* Syntax

---------

Co-authored-by: Jason Wen <haibin.wen3@gmail.com>

Author: devtekve

.github/workflows/mirror_to_gitlab.yaml

@@ -29,27 +29,18 @@ jobs:
           git config --global user.email 'action@github.com'
 
       - name: Set up SSH
-        uses: webfactory/ssh-agent@v0.5.3
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
 
       - name: Add GitLab public keys
         run: |
           ssh-keyscan -H gitlab.com >> ~/.ssh/known_hosts
 
+      # Note: If you have issues with "push rejected missing LFS" or something make sure you disabled LFS on the GITLAB repo if you intend to use a different LFS repo other than the target repo.
       - name: Sync and commit changes
         id: sync-and-commit
         run: |
-          git lfs pull
-
           # Add GitLab remote
           git remote add gitlab git@gitlab.com:sunnypilot/sunnyhaibin/sunnypilot-github-mirror.git
-
-          # Fetch from GitLab and check if the branch exists
-          if git fetch gitlab ${{ github.ref }}; then
-              # Merge changes from GitLab if the branch exists
-              git merge gitlab/${{ github.ref_name }} --allow-unrelated-histories --strategy-option=theirs
-          else
-              echo "Branch does not exist on GitLab, skipping merge."
-          fi
-          git push -u gitlab ${{ github.ref }} # If you have issues with "push rejected missing LFS" or something. Make sure you disabled LFS on the GITLAB repo if you intend to use a different LFS repo other than the target repo
+          git push -u --force gitlab ${{ github.ref }}

release/ci/sync-lfs.sh

@@ -4,4 +4,4 @@ mv .lfsconfig-comma .lfsconfig
 git lfs fetch --all; git lfs pull
 mv .lfsconfig .lfsconfig-comma
 mv .lfsconfig.bak .lfsconfig
-git lfs fetch --all; git lfs push origin main
+git lfs fetch --all; git lfs push --all origin