[9.x] Split Conditionable into package (#38457)

* [9.x] Split Conditionable into package

* Fix issue with 8.x merge

Author: inxilpro

HigherOrderWhenProxy.php

@@ -15,6 +15,7 @@
     ],
     "require": {
         "php": "^7.4|^8.0",
+        "illuminate/conditionable": "^9.0",
         "illuminate/contracts": "^9.0",
         "illuminate/macroable": "^9.0"
     },