Various clean up before v2 (#9672)

* Update package names

* Various clean up

* Gazelle

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

testing/bls/utils/utils.go

@@ -17,8 +17,8 @@ func RetrieveFiles(name string, t *testing.T) ([]string, [][]byte) {
 	testFiles, err := ioutil.ReadDir(filepath)
 	require.NoError(t, err)
 
-	fileNames := []string{}
-	fileContent := [][]byte{}
+	var fileNames []string
+	var fileContent [][]byte
 	require.Equal(t, false, len(testFiles) == 0, "no files exist in directory")
 	for _, f := range testFiles {
 		// Remove .yml suffix