Refactor process handling in AppiumLocalServiceTests

Removed the `using` statement for the current process in
`AppiumLocalServiceTests.cs`, allowing it to be referenced
without disposal. This simplifies the code while maintaining
the functionality to test graceful shutdown behavior on
Windows.

Author: Dor-bl

test/integration/ServerTests/AppiumLocalServiceTests.cs

@@ -111,12 +111,10 @@ public void TryGracefulShutdownOnWindows_ReturnsFalse_WhenNotWindows()
             var service = CreateService();
             var method = GetTryGracefulShutdownOnWindows();
 
-            // Use a running process (self)
-            using (var proc = Process.GetCurrentProcess())
-            {
-                var result = (bool)method.Invoke(service, new object[] { proc, 5000 });
-                Assert.That(result, Is.False);
-            }
+            // Use a running process (self) without disposing it
+            var proc = Process.GetCurrentProcess();
+            var result = (bool)method.Invoke(service, new object[] { proc, 5000 });
+            Assert.That(result, Is.False);
         }
 
         [Test]