CLOUDP-31301: add changelog entry and lint fix

Author: ciprian-tibulca

.changelog/3795.txt

@@ -0,0 +1,7 @@
+```release-note:enhancement
+data-source/mongodbatlas_alert_configuration: Adds `severity_override` attribute
+```
+
+```release-note:enhancement
+resource/mongodbatlas_alert_configuration: Adds `severity_override` attribute
+```

internal/service/alertconfiguration/data_source.go

@@ -27,13 +27,13 @@ type TFAlertConfigurationDSModel struct {
 	EventType             types.String                      `tfsdk:"event_type"`
 	Created               types.String                      `tfsdk:"created"`
 	Updated               types.String                      `tfsdk:"updated"`
+	SeverityOverride      types.String                      `tfsdk:"severity_override"`
 	Matcher               []TfMatcherModel                  `tfsdk:"matcher"`
 	MetricThresholdConfig []TfMetricThresholdConfigModel    `tfsdk:"metric_threshold_config"`
 	ThresholdConfig       []TfThresholdConfigModel          `tfsdk:"threshold_config"`
 	Notification          []TfNotificationModel             `tfsdk:"notification"`
 	Output                []TfAlertConfigurationOutputModel `tfsdk:"output"`
 	Enabled               types.Bool                        `tfsdk:"enabled"`
-	SeverityOverride      types.String                      `tfsdk:"severity_override"`
 }
 
 type TfAlertConfigurationOutputModel struct {

internal/service/alertconfiguration/resource.go

@@ -59,12 +59,12 @@ type TfAlertConfigurationRSModel struct {
 	EventType             types.String                   `tfsdk:"event_type"`
 	Created               types.String                   `tfsdk:"created"`
 	Updated               types.String                   `tfsdk:"updated"`
+	SeverityOverride      types.String                   `tfsdk:"severity_override"`
 	Matcher               []TfMatcherModel               `tfsdk:"matcher"`
 	MetricThresholdConfig []TfMetricThresholdConfigModel `tfsdk:"metric_threshold_config"`
 	ThresholdConfig       []TfThresholdConfigModel       `tfsdk:"threshold_config"`
 	Notification          []TfNotificationModel          `tfsdk:"notification"`
 	Enabled               types.Bool                     `tfsdk:"enabled"`
-	SeverityOverride      types.String                   `tfsdk:"severity_override"`
 }
 
 type TfMatcherModel struct {

internal/service/alertconfiguration/resource_test.go

@@ -1069,7 +1069,7 @@ func configWithEmptyOptionalBlocks(projectID string) string {
 	`, projectID)
 }
 
-func configWithSeverityOverride(projectID string, severity string) string {
+func configWithSeverityOverride(projectID, severity string) string {
 	return fmt.Sprintf(`
 		resource "mongodbatlas_alert_configuration" "test" {
 			project_id        = %[1]q