Preserve quote style in generated code (#15726)

## Summary

This is a first step toward fixing #7799 by using the quoting style
stored in the `flags` field on `ast::StringLiteral`s to select a quoting
style. This PR does not include support for f-strings or byte strings.

Several rules also needed small updates to pass along existing quoting
styles instead of using `StringLiteralFlags::default()`. The remaining
snapshot changes are intentional and should preserve the quotes from the
input strings.

## Test Plan

Existing tests with some accepted updates, plus a few new RUF055 tests
for raw strings.

---------

Co-authored-by: Alex Waygood <alex.waygood@gmail.com>

crates/ruff_python_formatter/tests/normalizer.rs

@@ -4,12 +4,12 @@ use {
     regex::Regex,
 };
 
-use ruff_python_ast::visitor::transformer;
 use ruff_python_ast::visitor::transformer::Transformer;
 use ruff_python_ast::{
     self as ast, BytesLiteralFlags, Expr, FStringElement, FStringFlags, FStringLiteralElement,
-    FStringPart, Stmt, StringFlags, StringLiteralFlags,
+    FStringPart, Stmt, StringFlags,
 };
+use ruff_python_ast::{visitor::transformer, StringLiteralFlags};
 use ruff_text_size::{Ranged, TextRange};
 
 /// A struct to normalize AST nodes for the purpose of comparing formatted representations for
@@ -81,7 +81,7 @@ impl Transformer for Normalizer {
                         string.value = ast::StringLiteralValue::single(ast::StringLiteral {
                             value: string.value.to_str().to_string().into_boxed_str(),
                             range: string.range,
-                            flags: StringLiteralFlags::default(),
+                            flags: StringLiteralFlags::empty(),
                         });
                     }
                 }