Add formatter support for call and class definition Arguments (#6274)

## Summary

This PR leverages the `Arguments` AST node introduced in #6259 in the
formatter, which ensures that we correctly handle trailing comments in
calls, like:

```python
f(
  1,
  # comment
)

pass
```

(Previously, this was treated as a leading comment on `pass`.)

This also allows us to unify the argument handling across calls and
class definitions.

## Test Plan

A bunch of new fixture tests, plus improved Black compatibility.

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

@@ -92,6 +92,31 @@ f(
 f(
     a.very_long_function_function_that_is_so_long_that_it_expands_the_parent_but_its_only_a_single_argument()
 )
+
+f( # abc
+)
+
+f( # abc
+    # abc
+)
+
+f(
+    # abc
+)
+
+f ( # abc
+    1
+)
+
+f (
+    # abc
+    1
+)
+
+f (
+    1
+    # abc
+)
 ```
 
 ## Output
@@ -137,8 +162,9 @@ f(
     these_arguments_have_values_that_need_to_break_because_they_are_too_long3=session,
 )
 
-f()
-# dangling comment
+f(
+    # dangling comment
+)
 
 
 f(only=1, short=1, arguments=1)
@@ -177,6 +203,28 @@ f(
 f(
     a.very_long_function_function_that_is_so_long_that_it_expands_the_parent_but_its_only_a_single_argument()
 )
+
+f()  # abc
+
+f(  # abc
+    # abc
+)
+
+f(
+    # abc
+)
+
+f(1)  # abc
+
+f(
+    # abc
+    1
+)
+
+f(
+    1
+    # abc
+)
 ```
 
 

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

@@ -130,8 +130,7 @@ a = {
     3: True,
 }
 
-x = {  # dangling end of line comment
-}
+x = {}  # dangling end of line comment
 ```
 
 

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

@@ -149,8 +149,7 @@ a = (
 # Regression test: lambda empty arguments ranges were too long, leading to unstable
 # formatting
 (
-    lambda: (  #
-    ),
+    lambda: (),  #
 )
 
 

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

@@ -33,8 +33,7 @@ b3 = [
 ```py
 # Dangling comment placement in empty lists
 # Regression test for https://github.com/python/cpython/blob/03160630319ca26dcbbad65225da4248e54c45ec/Tools/c-analyzer/c_analyzer/datafiles.py#L14-L16
-a1 = [  # a
-]
+a1 = []  # a
 a2 = [  # a
     # b
 ]

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

@@ -98,6 +98,58 @@ class Test:
     """Docstring"""
     # comment
     x = 1
+
+
+class C(): # comment
+    pass
+
+
+class C(  # comment
+):
+    pass
+
+
+class C(
+    # comment
+):
+    pass
+
+
+class C(): # comment
+    pass
+
+
+class C(  # comment
+    # comment
+    1
+):
+    pass
+
+
+class C(
+    1
+    # comment
+):
+    pass
+
+
+@dataclass
+# Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+class AltCLIPOutput(ModelOutput):
+    ...
+
+
+@dataclass
+class AltCLIPOutput( # Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+):
+    ...
+
+
+@dataclass
+class AltCLIPOutput(
+    # Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+):
+    ...
 ```
 
 ## Output
@@ -116,8 +168,7 @@ class Test((Aaaaaaaaaaaaaaaaa), Bbbbbbbbbbbbbbbb, metaclass=meta):
     pass
 
 
-class Test(
-    # trailing class comment
+class Test(  # trailing class comment
     Aaaaaaaaaaaaaaaaa,  # trailing comment
     # in between comment
     Bbbbbbbbbbbbbbbb,
@@ -217,6 +268,56 @@ class Test:
 
     # comment
     x = 1
+
+
+class C:  # comment
+    pass
+
+
+class C:  # comment
+    pass
+
+
+class C(
+    # comment
+):
+    pass
+
+
+class C:  # comment
+    pass
+
+
+class C(  # comment
+    # comment
+    1
+):
+    pass
+
+
+class C(
+    1
+    # comment
+):
+    pass
+
+
+@dataclass
+# Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+class AltCLIPOutput(ModelOutput):
+    ...
+
+
+@dataclass
+class AltCLIPOutput:  # Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+    ...
+
+
+@dataclass
+class AltCLIPOutput(
+    # Copied from transformers.models.clip.modeling_clip.CLIPOutput with CLIP->AltCLIP
+):
+    ...
 ```
 
 

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

@@ -215,8 +215,7 @@ del (
 )  # Completed
 # Done
 
-del (  # dangling end of line comment
-)
+del ()  # dangling end of line comment
 ```
 
 

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

@@ -192,8 +192,7 @@ raise aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfk < (
 )  # the other end
 # sneaky comment
 
-raise (  # another comment
-)
+raise ()  # another comment
 
 raise ()  # what now
 
@@ -201,8 +200,9 @@ raise (  # sould I stay here
     # just a comment here
 )  # trailing comment
 
-raise hello()  # sould I stay here
-# just a comment here  # trailing comment
+raise hello(  # sould I stay here
+    # just a comment here
+)  # trailing comment
 
 raise (
     # sould I stay here