Exclude .git from archived build, instead of deleting it (#8402)

Author: dlarocque

.github/workflows/test-all.yml

@@ -50,12 +50,10 @@ jobs:
         yarn
     - name: yarn build
       run: yarn build
-    - name: Remove git directory
-      run: rm -rf .git
     - name: Archive build
       if: ${{ !cancelled() }}
       run: |
-        tar -cf build.tar .
+        tar -cf build.tar --exclude=.git .
         gzip build.tar
     - name: Upload build archive
       if: ${{ !cancelled() }}