[Infra] Move ClientApp/ out of repo root (#12218)

Author: ncooke3

.github/workflows/client_app.yml

@@ -9,7 +9,7 @@ on:
       - "*.podspec"
       - "scripts/install_prereqs.sh"
       - "scripts/build.sh"
-      - "ClientApp/**"
+      - "IntegrationTesting/ClientApp/**"
       - "Gemfile*"
   schedule:
     # Run every day at 12am (PST) - cron uses UTC times

ClientApp/Podfile

@@ -75,7 +75,7 @@
 		EA5A62912A9914F300F5711A /* ClientApp_CocoaPods.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = ClientApp_CocoaPods.entitlements; sourceTree = "<group>"; };
 		EA5A62932A9914F300F5711A /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
 		EA7DF54229EF20B9005664A7 /* swift-import-test.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "swift-import-test.swift"; sourceTree = "<group>"; };
-		EA7DF54929EF2A92005664A7 /* firebase-ios-sdk */ = {isa = PBXFileReference; lastKnownFileType = wrapper; name = "firebase-ios-sdk"; path = ../; sourceTree = "<group>"; };
+		EA7DF54929EF2A92005664A7 /* firebase-ios-sdk */ = {isa = PBXFileReference; lastKnownFileType = wrapper; name = "firebase-ios-sdk"; path = ../../; sourceTree = "<group>"; };
 		EAA0A98F2AD8494F00C28FCD /* ClientApp-CocoaPods-iOS13.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "ClientApp-CocoaPods-iOS13.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		EAA0A9972AD8495000C28FCD /* ClientApp_CocoaPods_iOS13.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = ClientApp_CocoaPods_iOS13.entitlements; sourceTree = "<group>"; };
 		EAA0A9992AD8495000C28FCD /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };