[mdatagen] Fix generated tests for conditional enum attributes

Author: Arunodoy18

.chloggen/fix_mdatagen_enum_test.yaml

@@ -0,0 +1,4 @@
+change_type: bug_fix
+component: cmd/mdatagen
+note: Fix invalid generated tests for conditionally_required enum attributes in metrics.
+issues: [14196, 14230]

cmd/mdatagen/internal/templates/metrics.go.tmpl

@@ -100,9 +100,13 @@ func (maof metricAttributeOptionFunc) apply(dp pmetric.NumberDataPoint) {
 }
 
 {{ range getMetricConditionalAttributes .Attributes }}
-func With{{ .Render }}MetricAttribute({{ .RenderUnexported }}AttributeValue {{ (attributeInfo .).Type.Primitive }}) MetricAttributeOption {
+func With{{ .Render }}MetricAttribute({{ .RenderUnexported }}AttributeValue {{ if (attributeInfo .).Enum }}Attribute{{ .Render }}{{ else }}{{ (attributeInfo .).Type.Primitive }}{{ end }}) MetricAttributeOption {
 	return metricAttributeOptionFunc(func(dp pmetric.NumberDataPoint) {
+		{{- if (attributeInfo .).Enum }}
+		dp.Attributes().PutStr("{{ (attributeInfo .).Name }}", {{ .RenderUnexported }}AttributeValue.String())
+		{{- else }}
 		{{- template "putAttribute" . }}
+		{{- end }}
 	})
 }
 {{ end }}