Retain original funding sort order on website (fixes #1077)

Instead of sorting the funding sources when saving, we store them with
the original sort order and only perform sorting when generating
metadata. This allows the V2 algo to retain the same performance boost
while ensuring the Packagist website presents the sources in the
author's preferred order.

src/Packagist/WebBundle/Entity/Version.php

@@ -271,7 +271,7 @@ class Version
             $data['support'] = $this->getSupport();
         }
         if ($this->getFunding()) {
-            $data['funding'] = $this->getFunding();
+            $data['funding'] = $this->getFundingSorted();
         }
         if ($this->getReleasedAt()) {
             $data['time'] = $this->getReleasedAt()->format('Y-m-d\TH:i:sP');
@@ -631,16 +631,6 @@ class Version
      */
     public function setFunding($funding)
     {
-        // sort records when storing so to help the V2 metadata compression algo
-        if ($funding) {
-            usort($funding, function ($a, $b) {
-                $keyA = ($a['type'] ?? '') . ($a['url'] ?? '');
-                $keyB = ($b['type'] ?? '') . ($b['url'] ?? '');
-                
-                return $keyA <=> $keyB;
-            });
-        }
-
         $this->funding = $funding;
     }
 
@@ -654,6 +644,23 @@ class Version
         return $this->funding;
     }
 
+    /**
+     * Get funding, sorted to help the V2 metadata compression algo
+     */
+    public function getFundingSorted()
+    {
+        if ($this->funding === null) {
+            return null;
+        }
+
+        return usort($this->funding, function ($a, $b) {
+            $keyA = ($a['type'] ?? '') . ($a['url'] ?? '');
+            $keyB = ($b['type'] ?? '') . ($b['url'] ?? '');
+
+            return $keyA <=> $keyB;
+        });
+    }
+
     /**
      * Set createdAt
      *