Use an https callback for OIDC once again. (#3461)

* Use the new WAS callback type and return back to the https callback for OIDC.

* Simplify OIDCAuthenticationPresenter now it doesn't need to handle universal links.

* Remove old unit tests.

ElementX/Sources/Application/AppSettings.swift

@@ -153,14 +153,8 @@ final class AppSettings {
     
     /// Any pre-defined static client registrations for OIDC issuers.
     let oidcStaticRegistrations: [URL: String] = ["https://id.thirdroom.io/realms/thirdroom": "elementx"]
-    /// The redirect URL used for OIDC.
-    let oidcRedirectURL = {
-        guard let url = URL(string: "\(InfoPlistReader.main.appScheme):/callback") else {
-            fatalError("Invalid OIDC redirect URL")
-        }
-        
-        return url
-    }()
+    /// The redirect URL used for OIDC. This no longer uses universal links so we don't need the bundle ID to avoid conflicts between Element X, Nightly and PR builds.
+    let oidcRedirectURL: URL = "https://element.io/oidc/login"
     
     private(set) lazy var oidcConfiguration = OIDCConfigurationProxy(clientName: InfoPlistReader.main.bundleDisplayName,
                                                                      redirectURI: oidcRedirectURL,