[python_ast] Make the iter_mut functions public (#13542)

crates/ruff_python_ast/src/nodes.rs

@@ -1296,7 +1296,7 @@ impl FStringValue {
 
     /// Returns an iterator over all the [`FStringPart`]s contained in this value
     /// that allows modification.
-    pub(crate) fn iter_mut(&mut self) -> IterMut<FStringPart> {
+    pub fn iter_mut(&mut self) -> IterMut<FStringPart> {
         self.as_mut_slice().iter_mut()
     }
 
@@ -1749,7 +1749,7 @@ impl StringLiteralValue {
 
     /// Returns an iterator over all the [`StringLiteral`] parts contained in this value
     /// that allows modification.
-    pub(crate) fn iter_mut(&mut self) -> IterMut<StringLiteral> {
+    pub fn iter_mut(&mut self) -> IterMut<StringLiteral> {
         self.as_mut_slice().iter_mut()
     }
 
@@ -2138,7 +2138,7 @@ impl BytesLiteralValue {
 
     /// Returns an iterator over all the [`BytesLiteral`] parts contained in this value
     /// that allows modification.
-    pub(crate) fn iter_mut(&mut self) -> IterMut<BytesLiteral> {
+    pub fn iter_mut(&mut self) -> IterMut<BytesLiteral> {
         self.as_mut_slice().iter_mut()
     }