MM-19551: Add IsDefaultMarketplace to client config (#13183)

This exposes the necessary data to the webapp to know when to send more
detailed telemetry events.

config/client.go

@@ -132,6 +132,7 @@ func GenerateClientConfig(c *model.Config, diagnosticId string, license *model.L
 	props["PasswordRequireNumber"] = strconv.FormatBool(*c.PasswordSettings.Number)
 	props["PasswordRequireSymbol"] = strconv.FormatBool(*c.PasswordSettings.Symbol)
 	props["CustomUrlSchemes"] = strings.Join(c.DisplaySettings.CustomUrlSchemes, ",")
+	props["IsDefaultMarketplace"] = strconv.FormatBool(*c.PluginSettings.MarketplaceUrl == model.PLUGIN_SETTINGS_DEFAULT_MARKETPLACE_URL)
 
 	if license != nil {
 		props["ExperimentalHideTownSquareinLHS"] = strconv.FormatBool(*c.TeamSettings.ExperimentalHideTownSquareinLHS)