fix(ProfileManager): ensure switch method is agnostic

The Samples profile managers for each heaqdset all had a reference to
Meta in their `SwitchToProfile` method, which is confusing so this has
been updated so there is no reference to `Meta` in the method names at
all now.

Author: thestonefox

Samples~/PICOOpenXRPlugin/Editor/Config/PicoProfileManager.cs

@@ -15,7 +15,7 @@ public static void ShowWindow()
         }
 
         [MenuItem(menuRoot + menuSwitchPrefix + "Pico" + menuSwitchSuffix)]
-        public static void SwitchToMetaProfile()
+        public static void SwitchToProfile()
         {
             SwitchProfile<OpenXRProfileConfig>(_assetPath);
         }

Samples~/UnityOpenXRMeta/Editor/Config/MetaProfileManager.cs

@@ -15,7 +15,7 @@ public static void ShowWindow()
         }
 
         [MenuItem(menuRoot + menuSwitchPrefix + "Meta" + menuSwitchSuffix)]
-        public static void SwitchToMetaProfile()
+        public static void SwitchToProfile()
         {
             SwitchProfile<OpenXRProfileConfig>(_assetPath);
         }

Samples~/VIVEOpenXRPlugin/Editor/Config/ViveProfileManager.cs

@@ -15,7 +15,7 @@ public static void ShowWindow()
         }
 
         [MenuItem(menuRoot + menuSwitchPrefix + "Vive" + menuSwitchSuffix)]
-        public static void SwitchToMetaProfile()
+        public static void SwitchToProfile()
         {
             SwitchProfile<OpenXRProfileConfig>(_assetPath);
         }