perf(allocator): use lower bound of size hint when creating Vecs from…

… an iterator (#6194)

crates/oxc_allocator/src/vec.rs

@@ -95,7 +95,8 @@ impl<'alloc, T> Vec<'alloc, T> {
     #[inline]
     pub fn from_iter_in<I: IntoIterator<Item = T>>(iter: I, allocator: &'alloc Allocator) -> Self {
         let iter = iter.into_iter();
-        let capacity = iter.size_hint().1.unwrap_or(0);
+        let hint = iter.size_hint();
+        let capacity = hint.1.unwrap_or(hint.0);
         let mut vec = vec::Vec::with_capacity_in(capacity, &**allocator);
         vec.extend(iter);
         Self(vec)