Revert ICollection<TSource> check removal in Any() method

Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

Author: Copilot

src/libraries/System.Linq/src/System/Linq/AnyAll.cs

@@ -15,6 +15,11 @@ public static bool Any<TSource>(this IEnumerable<TSource> source)
                 ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
             }
 
+            if (source is ICollection<TSource> gc)
+            {
+                return gc.Count != 0;
+            }
+
             if (!IsSizeOptimized && source is Iterator<TSource> iterator)
             {
                 int count = iterator.GetCount(onlyIfCheap: true);