Add OpenAPI spec for incident user-defined fields config endpoints (#3858)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.generator/schemas/v2/openapi.yaml

@@ -746,6 +746,7 @@ func NewConfiguration() *Configuration {
 			"v2.CreateIncidentPostmortemTemplate":        false,
 			"v2.CreateIncidentTodo":                      false,
 			"v2.CreateIncidentType":                      false,
+			"v2.CreateIncidentUserDefinedField":          false,
 			"v2.DeleteGlobalIncidentHandle":              false,
 			"v2.DeleteIncident":                          false,
 			"v2.DeleteIncidentAttachment":                false,
@@ -755,6 +756,7 @@ func NewConfiguration() *Configuration {
 			"v2.DeleteIncidentPostmortemTemplate":        false,
 			"v2.DeleteIncidentTodo":                      false,
 			"v2.DeleteIncidentType":                      false,
+			"v2.DeleteIncidentUserDefinedField":          false,
 			"v2.GetGlobalIncidentSettings":               false,
 			"v2.GetIncident":                             false,
 			"v2.GetIncidentIntegration":                  false,
@@ -763,6 +765,7 @@ func NewConfiguration() *Configuration {
 			"v2.GetIncidentPostmortemTemplate":           false,
 			"v2.GetIncidentTodo":                         false,
 			"v2.GetIncidentType":                         false,
+			"v2.GetIncidentUserDefinedField":             false,
 			"v2.ImportIncident":                          false,
 			"v2.ListGlobalIncidentHandles":               false,
 			"v2.ListIncidentAttachments":                 false,
@@ -773,6 +776,7 @@ func NewConfiguration() *Configuration {
 			"v2.ListIncidents":                           false,
 			"v2.ListIncidentTodos":                       false,
 			"v2.ListIncidentTypes":                       false,
+			"v2.ListIncidentUserDefinedFields":           false,
 			"v2.SearchIncidents":                         false,
 			"v2.UpdateGlobalIncidentHandle":              false,
 			"v2.UpdateGlobalIncidentSettings":            false,
@@ -784,6 +788,7 @@ func NewConfiguration() *Configuration {
 			"v2.UpdateIncidentPostmortemTemplate":        false,
 			"v2.UpdateIncidentTodo":                      false,
 			"v2.UpdateIncidentType":                      false,
+			"v2.UpdateIncidentUserDefinedField":          false,
 			"v2.CreateAWSAccountCCMConfig":               false,
 			"v2.DeleteAWSAccountCCMConfig":               false,
 			"v2.GetAWSAccountCCMConfig":                  false,