Merge on boarding module to login module (#4746)

* Move onboarding code to the login module.

* Remove OnBoardingEntryPoint, move the flow to LoginFlowNode

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

tools/localazy/config.json

@@ -41,12 +41,6 @@
         "screen.join_room.loading_alert_title"
       ]
     },
-    {
-      "name" : ":features:onboarding:impl",
-      "includeRegex" : [
-        "screen_onboarding_.*"
-      ]
-    },
     {
       "name" : ":features:signedout:impl",
       "includeRegex" : [
@@ -149,6 +143,7 @@
     {
       "name" : ":features:login:impl",
       "includeRegex" : [
+        "screen_onboarding_.*",
         "screen_login_.*",
         "screen_server_confirmation_.*",
         "screen_change_server_.*",