Automatic Accessibility Audits on previews part 1 (#4322)

* setup target

* accessibility tests implementation

* removed ipad check

* pr improvements

* updated project

AccessibilityTests/SupportingFiles/AccessibilityTests.xctestplan

@@ -0,0 +1,52 @@
+{
+  "configurations" : [
+    {
+      "id" : "EFC6A442-D3B7-4273-B349-7A923C06AF5E",
+      "name" : "Default",
+      "options" : {
+
+      }
+    }
+  ],
+  "defaultOptions" : {
+    "addressSanitizer" : {
+      "enabled" : true
+    },
+    "codeCoverage" : {
+      "targets" : [
+        {
+          "containerPath" : "container:ElementX.xcodeproj",
+          "identifier" : "C0FAEB81CFD9776CD78CE489",
+          "name" : "ElementX"
+        }
+      ]
+    },
+    "defaultTestExecutionTimeAllowance" : 120,
+    "environmentVariableEntries" : [
+
+    ],
+    "language" : "en-US",
+    "locationScenario" : {
+      "identifier" : "San Francisco, CA, USA",
+      "referenceType" : "built-in"
+    },
+    "region" : "US",
+    "targetForVariableExpansion" : {
+      "containerPath" : "container:ElementX.xcodeproj",
+      "identifier" : "C0C687DE1D270F9895FEE186",
+      "name" : "AccessibilityTests"
+    },
+    "testTimeoutsEnabled" : true,
+    "undefinedBehaviorSanitizerEnabled" : true
+  },
+  "testTargets" : [
+    {
+      "target" : {
+        "containerPath" : "container:ElementX.xcodeproj",
+        "identifier" : "C0C687DE1D270F9895FEE186",
+        "name" : "AccessibilityTests"
+      }
+    }
+  ],
+  "version" : 1
+}

AccessibilityTests/SupportingFiles/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

AccessibilityTests/SupportingFiles/target.yml

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+name: AccessibilityTests
+
+schemes:
+  AccessibilityTests:
+    analyze:
+      config: Debug
+    archive:
+      config: Release
+    build:
+      targets:
+        AccessibilityTests: all
+    profile:
+      config: Release
+    run:
+      config: Debug
+      disableMainThreadChecker: false
+    test:
+      config: Debug
+      testPlans:
+        - path: AccessibilityTests.xctestplan
+          defaultPlan: true
+
+targets:
+  AccessibilityTests:
+    type: bundle.ui-testing
+    platform: iOS
+
+    dependencies:
+    - target: ElementX
+    - package: KZFileWatchers
+
+    info:
+      path: ../SupportingFiles/Info.plist
+
+    settings:
+      base:
+        PRODUCT_NAME: AccessibilityTests
+        PRODUCT_BUNDLE_IDENTIFIER: ${BASE_BUNDLE_IDENTIFIER}.accessibility.tests
+      configs:
+      # This is required to remove the $(inherited) flags
+      # which would prevent SnapshotTesting to be imported in UI Tests
+        debug:
+          OTHER_SWIFT_FLAGS: ["-DDEBUG"]
+        release:
+          OTHER_SWIFT_FLAGS: ["-DRELEASE"]
+
+    sources:
+    - path: ../Sources
+    - path: ../SupportingFiles
+    - path: ../../ElementX/Sources/UITests/UITestsSignalling.swift
+