Move TestMain into testhelper in _test packages

Our `TestMain` linter previously had a limitation that prevented it from
checking that blackbox testing packages, ones ending in `_test`,
contained a `TestMain` function. Generally this is not an issue as most
packages has tests in their primary package, but
`internal/git/packfile` and `internal/grpc/middleware/limithandler` are
exceptions.

Update these packages to move `TestMain` into `testhelper_test.go`.

4 files changed, 17 insertions, 8 deletions

diff --git a/internal/git/packfile/packfile_test.go b/internal/git/packfile/packfile_test.go
index 7605db79d..1c87407fa 100644
--- a/internal/git/packfile/packfile_test.go
+++ b/internal/git/packfile/packfile_test.go
@@ -11,10 +11,6 @@ import (
 	"gitlab.com/gitlab-org/gitaly/v16/internal/testhelper/testcfg"
 )
 
-func TestMain(m *testing.M) {
-	testhelper.Run(m)
-}
-
 func TestList(t *testing.T) {
 	t.Parallel()
 
diff --git a/internal/git/packfile/testhelper_test.go b/internal/git/packfile/testhelper_test.go
new file mode 100644
index 000000000..5c11ab605
--- /dev/null
+++ b/internal/git/packfile/testhelper_test.go
@@ -0,0 +1,11 @@
+package packfile_test
+
+import (
+	"testing"
+
+	"gitlab.com/gitlab-org/gitaly/v16/internal/testhelper"
+)
+
+func TestMain(m *testing.M) {
+	testhelper.Run(m)
+}
diff --git a/internal/grpc/middleware/limithandler/middleware_test.go b/internal/grpc/middleware/limithandler/middleware_test.go
index 65adad2be..b12748582 100644
--- a/internal/grpc/middleware/limithandler/middleware_test.go
+++ b/internal/grpc/middleware/limithandler/middleware_test.go
@@ -27,10 +27,6 @@ import (
 	"google.golang.org/protobuf/types/known/durationpb"
 )
 
-func TestMain(m *testing.M) {
-	testhelper.Run(m)
-}
-
 func fixedLockKey(ctx context.Context) string {
 	return "fixed-id"
 }
diff --git a/internal/grpc/middleware/limithandler/testhelper_test.go b/internal/grpc/middleware/limithandler/testhelper_test.go
index 137c47cce..c32e97579 100644
--- a/internal/grpc/middleware/limithandler/testhelper_test.go
+++ b/internal/grpc/middleware/limithandler/testhelper_test.go
@@ -4,7 +4,9 @@ import (
 	"context"
 	"io"
 	"sync/atomic"
+	"testing"
 
+	"gitlab.com/gitlab-org/gitaly/v16/internal/testhelper"
 	"google.golang.org/grpc/interop/grpc_testing"
 )
 
@@ -14,6 +16,10 @@ type server struct {
 	blockCh      chan struct{}
 }
 
+func TestMain(m *testing.M) {
+	testhelper.Run(m)
+}
+
 func (s *server) registerRequest() {
 	atomic.AddUint64(&s.requestCount, 1)
 }