style: format code with Gofumpt and Prettier

This commit fixes the style issues introduced in a532b7d according to the output
from Gofumpt and Prettier.

Details: #2477

internal/k8s/vald/benchmark/job/job_template.go

@@ -41,9 +41,7 @@ const (
 	svcAccount    = "vald-benchmark-operator"
 )
 
-var (
-	mode = int32(420)
-)
+var mode = int32(420)
 
 type BenchmarkJobTpl interface {
 	CreateJobTpl(opts ...BenchmarkJobOption) (k8s.Job, error)