[MM-27535] User invite limits for MM Cloud (#15197)

* Add a config for MM User Limit

* Adding graceful errors for if an administrator invites people passed their user limit

* Including changed vendor files

* Adding unit test

* Fix a bug

* Push up working tests (Thanks Joram)

* Add more cases, clean up logs in code

* One more case

* Refactoring based on PR comments

* Updating i18n

* Some changes based on PR review

* Remove a comment

* Bring back some translations that were somehow removed

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

config/client.go

@@ -52,6 +52,7 @@ func GenerateClientConfig(c *model.Config, diagnosticID string, license *model.L
 	props["ExperimentalEnablePostMetadata"] = "true"
 	props["ExperimentalEnableClickToReply"] = strconv.FormatBool(*c.ExperimentalSettings.EnableClickToReply)
 
+	props["ExperimentalCloudUserLimit"] = strconv.FormatInt(*c.ExperimentalSettings.CloudUserLimit, 8)
 	if *c.ServiceSettings.ExperimentalChannelOrganization || *c.ServiceSettings.ExperimentalGroupUnreadChannels != model.GROUP_UNREAD_CHANNELS_DISABLED {
 		props["ExperimentalChannelOrganization"] = strconv.FormatBool(true)
 	} else {
@@ -96,6 +97,8 @@ func GenerateClientConfig(c *model.Config, diagnosticID string, license *model.L
 
 	props["EnableEmailInvitations"] = strconv.FormatBool(*c.ServiceSettings.EnableEmailInvitations)
 
+	props["CloudUserLimit"] = strconv.FormatInt(*c.ExperimentalSettings.CloudUserLimit, 10)
+
 	// Set default values for all options that require a license.
 	props["ExperimentalHideTownSquareinLHS"] = "false"
 	props["ExperimentalTownSquareIsReadOnly"] = "false"