Mm 50013 - readd invite members screen cloud version (#22971)

* MM-50013-readd-invite-members-screen-cloud-version

* add the copy invite and fade in the skip buttons

* unify cloud and self hosted version

* add logic to send emails, and finish launching workspace

* fix styles

* remove unintended change

* fix translations

* fix unit tests

* fix styles

* fix styles

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Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/sass/base/_structure.scss

@@ -19,7 +19,6 @@ body {
 
     &.admin-onboarding {
         background-image: url('images/admin-onboarding-background.jpg');
-        background-position: 50%;
         background-repeat: no-repeat;
         background-size: cover;
     }