Fix instability with await fluent style (#8676)

Fix an instability where await was followed by a breaking fluent style
expression:

```python
test_data = await (
    Stream.from_async(async_data)
    .flat_map_async()
    .map()
    .filter_async(is_valid_data)
    .to_list()
)
```

Note that this technically a minor style change (see ecosystem check)

crates/ruff_python_formatter/tests/snapshots/black_compatibility@simple_cases__remove_await_parens.py.snap

@@ -93,7 +93,7 @@ async def main():
 ```diff
 --- Black
 +++ Ruff
-@@ -21,7 +21,9 @@
+@@ -21,11 +21,15 @@
  
  # Check comments
  async def main():
@@ -103,6 +103,13 @@ async def main():
 +    )
  
  
+ async def main():
+-    await asyncio.sleep(1)  # Hello
++    await (
++        asyncio.sleep(1)  # Hello
++    )
+ 
+ 
  async def main():
 ```
 
@@ -138,7 +145,9 @@ async def main():
 
 
 async def main():
-    await asyncio.sleep(1)  # Hello
+    await (
+        asyncio.sleep(1)  # Hello
+    )
 
 
 async def main():

crates/ruff_python_formatter/tests/snapshots/format@expression__await.py.snap

@@ -54,6 +54,15 @@ await (
     # comment
     [foo]
 )
+
+# https://github.com/astral-sh/ruff/issues/8644
+test_data = await (
+    Stream.from_async(async_data)
+    .flat_map_async()
+    .map()
+    .filter_async(is_valid_data)
+    .to_list()
+)
 ```
 
 ## Output
@@ -122,6 +131,15 @@ await (
     # comment
     [foo]
 )
+
+# https://github.com/astral-sh/ruff/issues/8644
+test_data = await (
+    Stream.from_async(async_data)
+    .flat_map_async()
+    .map()
+    .filter_async(is_valid_data)
+    .to_list()
+)
 ```