MM-44642 hide insights per license (#20490)

* MM-44642: Add a config key for Insights.

* MM-44642: Includes feature flag in config key/value conditional. Adds tests.

* MM-44642: Send the EnableCustomGroups and InsightsEnabled keys to unlicensed clients too.

* MM-44642: Adds some tests for Custom Groups config setting.

config/client.go

@@ -129,6 +129,8 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 	props["IsDefaultMarketplace"] = strconv.FormatBool(*c.PluginSettings.MarketplaceURL == model.PluginSettingsDefaultMarketplaceURL)
 	props["ExperimentalSharedChannels"] = "false"
 	props["CollapsedThreads"] = *c.ServiceSettings.CollapsedThreads
+	props["EnableCustomGroups"] = "false"
+	props["InsightsEnabled"] = "false"
 
 	if license != nil {
 		props["ExperimentalEnableAuthenticationTransfer"] = strconv.FormatBool(*c.ServiceSettings.ExperimentalEnableAuthenticationTransfer)
@@ -203,6 +205,10 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 		if license.SkuShortName == model.LicenseShortSkuProfessional || license.SkuShortName == model.LicenseShortSkuEnterprise {
 			props["EnableCustomGroups"] = strconv.FormatBool(*c.ServiceSettings.EnableCustomGroups)
 		}
+
+		if (license.SkuShortName == model.LicenseShortSkuProfessional || license.SkuShortName == model.LicenseShortSkuEnterprise) && c.FeatureFlags.InsightsEnabled {
+			props["InsightsEnabled"] = "true"
+		}
 	}
 
 	return props