temp remove zstd for self-hosted runners (#22459)

.github/workflows/staging-build-pr.yml

@@ -127,10 +127,6 @@ jobs:
             app.json \
             Procfile
 
-          ls -lh app.tar
-          zstd -q app.tar -o app.tar.zst
-          ls -lh app.tar.zst
-
       # Upload only the files needed to run this application.
       # We are not willing to trust the rest (e.g. script/) for the remainder
       # of the deployment process.
@@ -138,4 +134,4 @@ jobs:
         uses: actions/upload-artifact@27121b0bdffd731efa15d66772be8dc71245d074
         with:
           name: pr_build
-          path: app.tar.zst
+          path: app.tar

.github/workflows/staging-deploy-pr.yml

@@ -325,7 +325,6 @@ jobs:
 
       - name: Extract user-changes to temp directory
         run: |
-          zstd -d -q $RUNNER_TEMP/app.tar.zst -o $RUNNER_TEMP/app.tar
           mkdir $RUNNER_TEMP/app
           tar -x --file=$RUNNER_TEMP/app.tar -C "$RUNNER_TEMP/app/"