ci: Fix No space left on device (#833)

For android13 gki kernels, Google puts lots of unused file to kernel
source tree, while the Github Action only has 14G disk size and the ci
may fail because of "No space left on device". 

The `repo` tool will try pull all the refs and tags with depth=INT_MAX if it found the SHA1 hash doesn't exist on remote server even if you force it to fetch with `depth=1` and `--no-tags`. So we use the version `v2.16` which doesn't check it.

And also, using a fixed repo version can avoid randomly failure of building.

.github/workflows/gki-kernel.yml

@@ -86,17 +86,26 @@ jobs:
 
       - name: Setup kernel source
         run: |
+          echo "Free space:"
+          df -h
           cd $GITHUB_WORKSPACE
-          git clone https://gerrit.googlesource.com/git-repo
+          sudo apt-get install repo -y
           mkdir android-kernel && cd android-kernel
-          ../git-repo/repo init --depth=1 --u https://android.googlesource.com/kernel/manifest -b common-${{ inputs.tag }}
+          repo init --depth=1 --u https://android.googlesource.com/kernel/manifest -b common-${{ inputs.tag }} --repo-rev=v2.16
           REMOTE_BRANCH=$(git ls-remote https://android.googlesource.com/kernel/common ${{ inputs.tag }})
+          DEFAULT_MANIFEST_PATH=.repo/manifests/default.xml
           if grep -q deprecated <<< $REMOTE_BRANCH; then
             echo "Found deprecated branch: ${{ inputs.tag }}"
-            sed -i 's/"${{ inputs.tag }}"/"deprecated\/${{ inputs.tag }}"/g' .repo/manifests/default.xml
-            cat .repo/manifests/default.xml
+            sed -i 's/"${{ inputs.tag }}"/"deprecated\/${{ inputs.tag }}"/g' $DEFAULT_MANIFEST_PATH
+            cat $DEFAULT_MANIFEST_PATH
           fi
-          ../git-repo/repo sync -j$(nproc --all)
+          repo --version
+          repo --trace sync -q -c -j$(nproc --all) --no-tags
+          if [ -d prebuilts/clang/host/linux-x86 ] && [ -f common/build.config.constants ]; then
+            ls -d prebuilts/clang/host/linux-x86/clang-r* | grep -v $(sed -n 's/^CLANG_VERSION=//p' common/build.config.constants)
+          fi
+          rm -rf .repo
+          df -h
 
       - name: Setup KernelSU
         env: