[MM-53269] Add configuration setting for integration requests timeout (#23805)

Co-authored-by: Michael Kochell <6913320+mickmister@users.noreply.github.com>

server/public/model/config.go

@@ -214,6 +214,8 @@ const (
 	DataRetentionSettingsDefaultTimeBetweenBatchesMilliseconds = 100
 	DataRetentionSettingsDefaultRetentionIdsBatchSize          = 100
 
+	OutgoingIntegrationRequestsDefaultTimeout = 30
+
 	PluginSettingsDefaultDirectory         = "./plugins"
 	PluginSettingsDefaultClientDirectory   = "./client/plugins"
 	PluginSettingsDefaultEnableMarketplace = true
@@ -309,6 +311,7 @@ type ServiceSettings struct {
 	EnableIncomingWebhooks              *bool    `access:"integrations_integration_management"`
 	EnableOutgoingWebhooks              *bool    `access:"integrations_integration_management"`
 	EnableCommands                      *bool    `access:"integrations_integration_management"`
+	OutgoingIntegrationRequestsTimeout  *int64   `access:"integrations_integration_management"` // In seconds.
 	EnablePostUsernameOverride          *bool    `access:"integrations_integration_management"`
 	EnablePostIconOverride              *bool    `access:"integrations_integration_management"`
 	GoogleDeveloperKey                  *string  `access:"site_posts,write_restrictable,cloud_restrictable"`
@@ -509,6 +512,10 @@ func (s *ServiceSettings) SetDefaults(isUpdate bool) {
 		s.EnableOutgoingWebhooks = NewBool(true)
 	}
 
+	if s.OutgoingIntegrationRequestsTimeout == nil {
+		s.OutgoingIntegrationRequestsTimeout = NewInt64(OutgoingIntegrationRequestsDefaultTimeout)
+	}
+
 	if s.ConnectionSecurity == nil {
 		s.ConnectionSecurity = NewString("")
 	}
@@ -4011,6 +4018,10 @@ func (s *ServiceSettings) isValid() *AppError {
 		return NewAppError("Config.IsValid", "model.config.is_valid.listen_address.app_error", nil, "", http.StatusBadRequest)
 	}
 
+	if *s.OutgoingIntegrationRequestsTimeout <= 0 {
+		return NewAppError("Config.IsValid", "model.config.is_valid.outgoing_integrations_request_timeout.app_error", nil, "", http.StatusBadRequest)
+	}
+
 	if *s.ExperimentalGroupUnreadChannels != GroupUnreadChannelsDisabled &&
 		*s.ExperimentalGroupUnreadChannels != GroupUnreadChannelsDefaultOn &&
 		*s.ExperimentalGroupUnreadChannels != GroupUnreadChannelsDefaultOff {