remove bogus build steps, added retries to yarn install in new places

fixes #138983

build/azure-pipelines/linux/product-build-linux.yml

@@ -65,9 +65,15 @@ steps:
 
   - script: |
       set -e
-      yarn --cwd build
-      yarn --cwd build compile
-    displayName: Compile build tools
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --cwd build --frozen-lockfile && break
+        if [ $i -eq 3 ]; then
+          echo "Yarn failed too many times" >&2
+          exit 1
+        fi
+        echo "Yarn failed $i, trying again..."
+      done
+    displayName: Install build dependencies
 
   - script: |
       set -e