Check for signed variable (#8682)

* Check for signed variable

* Check for signed

* use variable syntax

* Signed has to be upper case

build/azure-pipelines/darwin/createDrop.sh

@@ -6,7 +6,9 @@ REPO="$(pwd)"
 mkdir -p $REPO/.build/darwin/{archive,server}
 
 # remove pkg from archive
-zip -d $REPO/.build/darwin/archive/azuredatastudio-darwin.zip "*.pkg"
+if [[ "$SIGNED" == "true" ]]; then
+	zip -d $REPO/.build/darwin/archive/azuredatastudio-darwin.zip "*.pkg"
+fi
 
 # package Remote Extension Host
 pushd .. && mv azuredatastudio-reh-darwin azuredatastudio-server-darwin && zip -Xry $REPO/.build/darwin/server/azuredatastudio-server-darwin.zip azuredatastudio-server-darwin && popd

build/azure-pipelines/darwin/sql-product-build-darwin.yml

@@ -129,6 +129,7 @@ steps:
           }
         ]
       SessionTimeout: 20
+    condition: and(succeeded(), eq(variables['signed'], true))
 
   - script: |
       set -e