Switch the CI to code 14 and the iOS 14 simulator, fix UI tests

RiotSwiftUI/Modules/Common/Test/UI/XCUIApplication+Riot.swift

@@ -20,16 +20,33 @@ import XCTest
 extension XCUIApplication {
     func goToScreenWithIdentifier(_ identifier: String) {
         // Search for the screen identifier
-        textFields["searchQueryTextField"].tap()
-        typeText(identifier)
-        
+        let textField = textFields["searchQueryTextField"]
         let button = buttons[identifier]
-        let footer = staticTexts["footerText"]
         
-        while !button.isHittable, !footer.isHittable {
-            tables.firstMatch.swipeUp()
+        // Sometimes the search gets stuck without showing any results. Try to nudge it along
+        for _ in 0...10 {
+            textField.clearAndTypeText(identifier)
+            if button.exists {
+                break
+            }
         }
         
         button.tap()
     }
 }
+
+private extension XCUIElement {
+    func clearAndTypeText(_ text: String) {
+        guard let stringValue = value as? String else {
+            XCTFail("Tried to clear and type text into a non string value")
+            return
+        }
+
+        tap()
+
+        let deleteString = String(repeating: XCUIKeyboardKey.delete.rawValue, count: stringValue.count)
+
+        typeText(deleteString)
+        typeText(text)
+    }
+}