fix: resolve test compilation issues

- Fix api/health/health_test.go atomic import
- Fix vms/components/message/tx_test.go crypto import

Author: zeekay

api/health/health_test.go

@@ -174,7 +174,7 @@ func TestPassingChecks(t *testing.T) {
 func TestPassingThenFailingChecks(t *testing.T) {
 	require := require.New(t)
 
-	var shouldCheckErr utils.Atomic[bool]
+	var shouldCheckErr atomic.Atomic[bool]
 	check := CheckerFunc(func(context.Context) (interface{}, error) {
 		if shouldCheckErr.Get() {
 			return errUnhealthy.Error(), errUnhealthy

vms/components/message/tx_test.go

@@ -9,13 +9,13 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/luxfi/constants"
-	"github.com/luxfi/utils"
+	"github.com/luxfi/crypto"
 )
 
 func TestTx(t *testing.T) {
 	require := require.New(t)
 
-	tx := utils.RandomBytes(256 * constants.KiB)
+	tx := crypto.RandomBytes(256 * constants.KiB)
 	builtMsg := Tx{
 		Tx: tx,
 	}