Accurate vcpkg feature availability for winhttp (#5114)

* Accurate vcpkg feature availability for winhttp

---------

Co-authored-by: Anton Kolesnyk <antkmsft@users.noreply.github.com>

sdk/core/azure-core/vcpkg.json

@@ -13,10 +13,6 @@
     {
       "name": "vcpkg-cmake-config",
       "host": true
-    },
-    {
-      "name": "wil",
-      "platform": "windows"
     }
   ],
   "default-features": [
@@ -62,11 +58,13 @@
     },
     "winhttp": {
       "description": "WinHTTP HTTP transport implementation",
+      "supports": "windows & !uwp",
       "dependencies": [
         {
           "name": "azure-core-cpp",
           "default-features": false
-        }
+        },
+        "wil"
       ]
     }
   }

sdk/core/azure-core/vcpkg/vcpkg.json

@@ -68,7 +68,7 @@
     },
     "winhttp": {
       "description": "WinHTTP HTTP transport implementation",
-      "supports": "windows",
+      "supports": "windows & !uwp",
       "dependencies": [
         {
           "name": "azure-core-cpp",