PY-53120 "Add method" action does not create async def

GitOrigin-RevId: 8b2286a3f50d7b0d00ebbb0befc9811a80f7b304

python/testData/quickFixes/PyAddMethodQuickFixTest/addAsyncMethodFromInstance.py

@@ -0,0 +1,7 @@
+class A:
+    def __init__(self):
+        self.x = 1
+
+async def f():
+    a = A()
+    await a.<caret><warning descr="Unresolved attribute reference 'y' for class 'A'">y</warning>()

python/testData/quickFixes/PyAddMethodQuickFixTest/addAsyncMethodFromInstance_after.py

@@ -0,0 +1,11 @@
+class A:
+    def __init__(self):
+        self.x = 1
+
+    async def y(self):
+        pass
+
+
+async def f():
+    a = A()
+    await a.y()

python/testData/quickFixes/PyAddMethodQuickFixTest/addAsyncMethodFromMethod.py

@@ -0,0 +1,11 @@
+class A:
+    def __init__(self):
+        self.x = 1
+
+    async def foo(self, a):
+        await self.<caret><warning descr="Unresolved attribute reference 'y' for class 'A'">y</warning>(1, a)
+
+# Some comment
+
+class B:
+    pass

python/testData/quickFixes/PyAddMethodQuickFixTest/addAsyncMethodFromMethod_after.py

@@ -0,0 +1,15 @@
+class A:
+    def __init__(self):
+        self.x = 1
+
+    async def foo(self, a):
+        await self.y(1, a)
+
+    async def y(self, param, a):
+        pass
+
+
+# Some comment
+
+class B:
+    pass