signer: run tests in parallel (#28536)

marks tests as parallel-safe in package signer

signer/storage/aes_gcm_storage_test.go

@@ -29,6 +29,7 @@ import (
 )
 
 func TestEncryption(t *testing.T) {
+	t.Parallel()
 	//	key := []byte("AES256Key-32Characters1234567890")
 	//	plaintext := []byte(value)
 	key := []byte("AES256Key-32Characters1234567890")
@@ -51,6 +52,7 @@ func TestEncryption(t *testing.T) {
 }
 
 func TestFileStorage(t *testing.T) {
+	t.Parallel()
 	a := map[string]storedCredential{
 		"secret": {
 			Iv:         common.Hex2Bytes("cdb30036279601aeee60f16b"),
@@ -89,6 +91,7 @@ func TestFileStorage(t *testing.T) {
 	}
 }
 func TestEnd2End(t *testing.T) {
+	t.Parallel()
 	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(3), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))
 
 	d := t.TempDir()
@@ -109,6 +112,7 @@ func TestEnd2End(t *testing.T) {
 }
 
 func TestSwappedKeys(t *testing.T) {
+	t.Parallel()
 	// It should not be possible to swap the keys/values, so that
 	// K1:V1, K2:V2 can be swapped into K1:V2, K2:V1
 	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(3), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))