bpo-36373: Deprecate explicit loop parameter in all public asyncio APIs [locks] (GH-13920)

This PR deprecate explicit loop parameters in all public asyncio APIs

This issues is split to be easier to review.

Third step: locks.py

https://bugs.python.org/issue36373
(cherry picked from commit 537877d85d)

Co-authored-by: Emmanuel Arias <emmanuelarias30@gmail.com>

Lib/test/test_asyncio/test_pep492.py

@@ -43,12 +43,13 @@ class BaseTest(test_utils.TestCase):
 class LockTests(BaseTest):
 
     def test_context_manager_async_with(self):
-        primitives = [
-            asyncio.Lock(loop=self.loop),
-            asyncio.Condition(loop=self.loop),
-            asyncio.Semaphore(loop=self.loop),
-            asyncio.BoundedSemaphore(loop=self.loop),
-        ]
+        with self.assertWarns(DeprecationWarning):
+            primitives = [
+                asyncio.Lock(loop=self.loop),
+                asyncio.Condition(loop=self.loop),
+                asyncio.Semaphore(loop=self.loop),
+                asyncio.BoundedSemaphore(loop=self.loop),
+            ]
 
         async def test(lock):
             await asyncio.sleep(0.01)
@@ -65,12 +66,13 @@ class LockTests(BaseTest):
             self.assertFalse(primitive.locked())
 
     def test_context_manager_with_await(self):
-        primitives = [
-            asyncio.Lock(loop=self.loop),
-            asyncio.Condition(loop=self.loop),
-            asyncio.Semaphore(loop=self.loop),
-            asyncio.BoundedSemaphore(loop=self.loop),
-        ]
+        with self.assertWarns(DeprecationWarning):
+            primitives = [
+                asyncio.Lock(loop=self.loop),
+                asyncio.Condition(loop=self.loop),
+                asyncio.Semaphore(loop=self.loop),
+                asyncio.BoundedSemaphore(loop=self.loop),
+            ]
 
         async def test(lock):
             await asyncio.sleep(0.01)