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/src/expression/expr_await.rs

@@ -20,7 +20,7 @@ impl FormatNodeRule<ExprAwait> for FormatExprAwait {
             [
                 token("await"),
                 space(),
-                maybe_parenthesize_expression(value, item, Parenthesize::IfRequired)
+                maybe_parenthesize_expression(value, item, Parenthesize::IfBreaks)
             ]
         )
     }

crates/ruff_python_formatter/src/expression/parentheses.rs

@@ -14,6 +14,7 @@ use crate::comments::{
 use crate::context::{NodeLevel, WithNodeLevel};
 use crate::prelude::*;
 
+/// From the perspective of the expression, under which circumstances does it need parentheses
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
 pub(crate) enum OptionalParentheses {
     /// Add parentheses if the expression expands over multiple lines
@@ -41,7 +42,8 @@ pub(crate) trait NeedsParentheses {
     ) -> OptionalParentheses;
 }
 
-/// Configures if the expression should be parenthesized.
+/// From the perspective of the parent statement or expression, when should the child expression
+/// get parentheses?
 #[derive(Copy, Clone, Debug, PartialEq)]
 pub(crate) enum Parenthesize {
     /// Parenthesizes the expression if it doesn't fit on a line OR if the expression is parenthesized in the source code.