Auto-generate formatter nodes for string parts (#8837)

A follow-up to auto-generate the `FormatNodeRule` implementation for the
string part nodes. This is just a dummy implementation that is
unreachable because it's handled by the parent nodes.

crates/ruff_python_formatter/src/other/bytes_literal.rs

@@ -0,0 +1,12 @@
+use ruff_python_ast::BytesLiteral;
+
+use crate::prelude::*;
+
+#[derive(Default)]
+pub struct FormatBytesLiteral;
+
+impl FormatNodeRule<BytesLiteral> for FormatBytesLiteral {
+    fn fmt_fields(&self, _item: &BytesLiteral, _f: &mut PyFormatter) -> FormatResult<()> {
+        unreachable!("Handled inside of `FormatExprBytesLiteral`");
+    }
+}

crates/ruff_python_formatter/src/other/f_string.rs

@@ -0,0 +1,12 @@
+use ruff_python_ast::FString;
+
+use crate::prelude::*;
+
+#[derive(Default)]
+pub struct FormatFString;
+
+impl FormatNodeRule<FString> for FormatFString {
+    fn fmt_fields(&self, _item: &FString, _f: &mut PyFormatter) -> FormatResult<()> {
+        unreachable!("Handled inside of `FormatExprFString`");
+    }
+}

crates/ruff_python_formatter/src/other/mod.rs

@@ -1,14 +1,17 @@
 pub(crate) mod alias;
 pub(crate) mod arguments;
+pub(crate) mod bytes_literal;
 pub(crate) mod commas;
 pub(crate) mod comprehension;
 pub(crate) mod decorator;
 pub(crate) mod elif_else_clause;
 pub(crate) mod except_handler_except_handler;
+pub(crate) mod f_string;
 pub(crate) mod identifier;
 pub(crate) mod keyword;
 pub(crate) mod match_case;
 pub(crate) mod parameter;
 pub(crate) mod parameter_with_default;
 pub(crate) mod parameters;
+pub(crate) mod string_literal;
 pub(crate) mod with_item;

crates/ruff_python_formatter/src/other/string_literal.rs

@@ -0,0 +1,12 @@
+use ruff_python_ast::StringLiteral;
+
+use crate::prelude::*;
+
+#[derive(Default)]
+pub struct FormatStringLiteral;
+
+impl FormatNodeRule<StringLiteral> for FormatStringLiteral {
+    fn fmt_fields(&self, _item: &StringLiteral, _f: &mut PyFormatter) -> FormatResult<()> {
+        unreachable!("Handled inside of `FormatExprStringLiteral`");
+    }
+}