MM-54123 Add group to channel (#22954)

* adding group members to channel initial commit

* adding group to channel functionality along with add new team members

* fixing circular dependency

* fixing e2e and other optimizations

* adding e2e tests for adding group members to channels

* cypress lint

* fixing comments

* adding count to button

* improvements

* adjusting some stuff from PR comments

* remove ability to add user to team, update message for non-team members

* remove adding to team from add groups functionality

* update misspelled variable

* lint and unit test fixes

* add tests, cleanup

* lint fix

* revert package-lock.json

* fixes for cypress tests

* rename TeamInviteBanner to TeamWarningBanner, since invites are no longer allowed

* update for warning

* lint fixes

* cleanup

* fix failing e2e tests

* update messages to not use markdown

---------

Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/cypress/tests/integration/channels/enterprise/system_console/channel_members_spec.js

@@ -119,7 +119,7 @@ describe('Channel members test', () => {
         cy.get('#addChannelMembers').click();
 
         // # Enter user1 and user2 emails
-        cy.findByRole('textbox', {name: 'Search for people'}).typeWithForce(`${user1.email}{enter}${user2.email}{enter}`);
+        cy.findByRole('textbox', {name: 'Search for people or groups'}).typeWithForce(`${user1.email}{enter}${user2.email}{enter}`);
 
         // # Confirm add the users
         cy.get('#addUsersToChannelModal #saveItems').click();