Update the maestro sign-in flow for the consolidated account provider screen

.maestro/tests/account/changeServer.yaml

@@ -1,21 +0,0 @@
-appId: ${MAESTRO_APP_ID}
----
-- tapOn:
-    id: "login-change_server"
-- takeScreenshot: build/maestro/200-ChangeServer
-- tapOn: "matrix.org"
-- tapOn:
-    id: "login-change_server"
-- tapOn: "Other"
-- tapOn:
-    id: "change_server-server"
-- inputText: "element"
-- hideKeyboard
-- extendedWaitUntil:
-    visible: "element.io"
-    timeout: 10000
-- tapOn: "element.io"
-# Revert to matrix.org
-- tapOn:
-    id: "login-change_server"
-- tapOn: "matrix.org"

.maestro/tests/account/login.yaml

@@ -3,8 +3,7 @@ appId: ${MAESTRO_APP_ID}
 - tapOn: "Sign in manually"
 - runFlow: ../assertions/assertLoginDisplayed.yaml
 - takeScreenshot: build/maestro/100-SignIn
-- runFlow: changeServer.yaml
+# The account provider field defaults to matrix.org, so continue straight to the MAS login.
-- runFlow: ../assertions/assertLoginDisplayed.yaml
 - tapOn:
     id: "login-continue"
 ## MAS page

.maestro/tests/assertions/assertLoginDisplayed.yaml

@@ -1,5 +1,5 @@
 appId: ${MAESTRO_APP_ID}
 ---
 - extendedWaitUntil:
-    visible: "Change account provider"
+    visible: "Enter your account provider"
     timeout: 10000