Enable race testing in validation

internal/candidate/check.go

@@ -29,6 +29,7 @@ type Request struct {
 	RepositoryDir    string
 	Product          string
 	Version          string
+	Validation       validation.Settings
 	AdditionalChecks func(context.Context, Candidate) error
 	AfterValidate    func(context.Context, Candidate) error
 	Output           io.Writer
@@ -95,13 +96,14 @@ func Capture(ctx context.Context, request Request) (Candidate, error) {
 	return Candidate{RepositoryDir: repositoryDir, Commit: state.commit, Version: request.Version, Note: string(note)}, nil
 }
 
-// Validate runs the standard offline Go suite, followed by AdditionalChecks
+// Validate runs the selected offline Go suite, followed by AdditionalChecks
 // when supplied, for the captured candidate.
 func Validate(ctx context.Context, request Request, captured Candidate) error {
 	if err := validation.Run(ctx, validation.Request{
 		RepositoryDir: captured.RepositoryDir,
 		Commit:        captured.Commit,
 		Output:        request.Output,
+		Settings:      request.Validation,
 	}); err != nil {
 		return fmt.Errorf("validate candidate %s: %w", captured.Commit, err)
 	}