More tweaks to CI pipeline (#41941)

Closes #ISSUE

Release Notes:

- N/A *or* Added/Fixed/Improved ...

.github/workflows/cherry_pick.yml

@@ -12,6 +12,10 @@ on:
         description: branch
         required: true
         type: string
+      channel:
+        description: channel
+        required: true
+        type: string
 jobs:
   run_cherry_pick:
     runs-on: namespace-profile-2x4-ubuntu-2404
@@ -20,6 +24,16 @@ jobs:
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       with:
         clean: false
+    - id: get-app-token
+      name: cherry_pick::run_cherry_pick::authenticate_as_zippy
+      uses: actions/create-github-app-token@bef1eaf1c0ac2b148ee2a0a74c65fbe6db0631f1
+      with:
+        app-id: ${{ secrets.ZED_ZIPPY_APP_ID }}
+        private-key: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
     - name: cherry_pick::run_cherry_pick::cherry_pick
-      run: ./scripts/cherry-pick ${{ inputs.branch }} ${{ inputs.commit }}
+      run: ./script/cherry-pick ${{ inputs.branch }} ${{ inputs.commit }} ${{ inputs.channel }}
       shell: bash -euxo pipefail {0}
+      env:
+        GIT_COMMITTER_NAME: Zed Zippy
+        GIT_COMMITTER_EMAIL: hi@zed.dev
+        GITHUB_TOKEN: ${{ steps.get-app-token.outputs.token }}