Automatic channel category sorting (#30866)

* Automatic channel category sorting

* Fix types

* AIed

* Fix issue where categories are updated for all users

* Move all logic to server, clean up

* PR feedback

* Fix lint

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

e2e-tests/playwright/lib/src/server/default_config.ts

@@ -608,6 +608,7 @@ const defaultServerConfig: AdminConfig = {
         DisableWakeUpReconnectHandler: false,
         UsersStatusAndProfileFetchingPollIntervalMilliseconds: 3000,
         YoutubeReferrerPolicy: false,
+        ExperimentalChannelCategorySorting: false,
     },
     AnalyticsSettings: {
         MaxUsersForStatistics: 2500,