Automatic Accessibility Audits on previews part 1 (#4322)

* setup target

* accessibility tests implementation

* removed ipad check

* pr improvements

* updated project

ElementX/SupportingFiles/target.yml

@@ -180,6 +180,18 @@ targets:
         else
             echo "warning: Sourcery not installed, run swift run tools setup-project"
         fi
+        
+    - name: 🧙 Sourcery - Generate Accessibility Tests
+      runOnlyWhenInstalling: false
+      basedOnDependencyAnalysis: false
+      shell: /bin/sh
+      script: |
+        export PATH="$PATH:/opt/homebrew/bin"
+        if which sourcery >/dev/null; then
+            sourcery --config Tools/Sourcery/TestablePreviewsDictionary.yml
+        else
+            echo "warning: Sourcery not installed, run swift run tools setup-project"
+        fi
 
     postBuildScripts:
     - name: ⚠️ SwiftLint