test: Add t.Helper() calls in nested tests (#1258)

This fixes incorrect line numbers being reported in test failures. This
was discovered as noted in
#1257 (comment).

Author: jimmidyson

common/pkg/k8s/parser/parser_test.go

@@ -141,6 +141,7 @@ func runUnstructuredTests(t *testing.T, fn func([]string) ([]client.Object, erro
 	t.Parallel()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Helper()
 			t.Parallel()
 			got, err := fn(tt.inputs)
 			if tt.wantErr != "" {

common/pkg/testutils/capitest/variables.go

@@ -79,6 +79,8 @@ func ValidateDiscoverVariablesAs[V mutation.DiscoverVariables, T any](
 
 	for _, tt := range variableTestDefs {
 		t.Run(tt.Name, func(t *testing.T) {
+			t.Helper()
+
 			t.Parallel()
 
 			g := gomega.NewWithT(t)