backgrounding UI tests (#3021)

Task/Issue URL: https://app.asana.com/0/392891325557410/1207589902638374/f
Tech Design URL:
CC: @bwaresiak

Description:
Adds tests for backgrounding the app.

Steps to test this PR:

Verify end to end test job as passed https://github.com/duckduckgo/iOS/actions/runs/9766061419
In terminal cd into .maestro
Run setup_ui_tests.sh
Optional: run all the release tests in one go using: run_tests_tests.sh release_tests
Run run_ui_tests.sh release_tests/backgrounding.yaml

.maestro/release_tests/backgrounding.yaml

@@ -0,0 +1,75 @@
+# backgrounding.yaml
+appId: com.duckduckgo.mobile.ios
+tags:
+    - release
+
+---
+
+# Set up 
+- clearState
+- launchApp
+- runFlow: 
+    file: ../shared/onboarding.yaml
+
+# Load Site
+- assertVisible:
+    id: "searchEntry"
+- tapOn: 
+    id: "searchEntry"
+- inputText: "https://privacy-test-pages.site"
+- pressKey: Enter
+
+# Manage onboarding
+- runFlow:
+    file: ../shared/onboarding_browsing.yaml
+
+# Go home and hover there a bit
+- pressKey: Home
+- swipe:  
+    start: 50%, 50%
+    end: 10%, 50%
+- swipe:  
+    start: 10%, 50%
+    end: 50%, 50%
+- tapOn: "DuckDuckGo"
+
+# Validate
+- assertVisible: "Privacy Test Pages"
+- assertVisible: "Browsing menu"
+- tapOn: "Browsing menu"
+- assertVisible: "Add Bookmark"
+- tapOn: "Add Bookmark"
+- tapOn: 
+    id: PrivacyIcon
+- assertVisible: "Protections are ON for this site"
+- tapOn: "Done"
+
+# Run background assertion from new tab page
+- assertVisible: "Tab Switcher"
+- tapOn: "Tab Switcher"
+- tapOn: "New Tab"
+
+# Go home and hover there a bit
+- pressKey: Home
+- swipe:  
+    start: 50%, 50%
+    end: 10%, 50%
+- swipe:  
+    start: 10%, 50%
+    end: 50%, 50%
+- tapOn: "DuckDuckGo"
+
+# Check menus
+- tapOn: "Cancel"
+- tapOn: "Settings"
+- assertVisible: "Default Browser"
+- tapOn: "Done"
+
+- assertVisible: "Bookmarks"
+- tapOn: "Bookmarks"
+- assertVisible: "Privacy Test Pages - Home"
+- tapOn: "Done"
+
+- assertVisible: "Tab Switcher"
+- tapOn: "Tab Switcher"
+

DuckDuckGo/Base.lproj/OmniBar.xib

@@ -170,7 +170,7 @@
                                                             <rect key="frame" x="0.0" y="2" width="43" height="38"/>
                                                         </imageView>
                                                     </subviews>
-                                                    <accessibility key="accessibilityConfiguration">
+                                                    <accessibility key="accessibilityConfiguration" identifier="PrivacyIcon">
                                                         <accessibilityTraits key="traits" button="YES"/>
                                                         <bool key="isElement" value="YES"/>
                                                     </accessibility>