[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

utils/urlencode_test.go

@@ -9,7 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestUrlEncode(t *testing.T) {
+func TestURLEncode(t *testing.T) {
 
 	toEncode := "testing 1 2 3"
 	encoded := URLEncode(toEncode)