Revert "ci: use ddk for faster ci, manual gki image build"

This reverts commit 33d1f18395.

.github/workflows/build-gki-image.yml

@@ -1,37 +0,0 @@
-name: Build Android GKI Image
-on:
-  workflow_call:
-  workflow_dispatch:
-    inputs:
-      debug:
-        description: 'Build debug kernel'
-        required: false
-        type: boolean
-        default: false
-
-jobs:
-  build-a12-kernel:
-    uses: ./.github/workflows/build-kernel-a12.yml
-    secrets: inherit
-    with:
-      debug: ${{ github.event.inputs.debug || false }}
-  build-a13-kernel:
-    uses: ./.github/workflows/build-kernel-a13.yml
-    secrets: inherit
-    with:
-      debug: ${{ github.event.inputs.debug || false }}
-  build-a14-kernel:
-    uses: ./.github/workflows/build-kernel-a14.yml
-    secrets: inherit
-    with:
-      debug: ${{ github.event.inputs.debug || false }}
-  build-a15-kernel:
-    uses: ./.github/workflows/build-kernel-a15.yml
-    secrets: inherit
-    with:
-      debug: ${{ github.event.inputs.debug || false }}
-  build-a16-kernel:
-    uses: ./.github/workflows/build-kernel-a16.yml
-    secrets: inherit
-    with:
-      debug: ${{ github.event.inputs.debug || false }}