perf(str): static_ident! and static_str! macros guarantee const evaluation (#28340)

`static_ident!` and `static_str!` macros are intended to evaluate at compile time. This is especially valuable for `static_ident!` as we want the hash to be calculated at compile time.

Wrap both in a `const { ... }` block to ensure they are const-evaluated.

crates/oxc_str/src/ident.rs

@@ -581,7 +581,8 @@ pub type ArenaIdentHashSet<'alloc> =
 #[macro_export]
 macro_rules! static_ident {
     ($s:literal) => {
-        $crate::__internal::new_const_ident($s)
+        // `const { ... }` block guarantees evaluation at compile time
+        const { $crate::__internal::new_const_ident($s) }
     };
 }
 

crates/oxc_str/src/str.rs

@@ -341,7 +341,8 @@ impl ESTree for Str<'_> {
 #[macro_export]
 macro_rules! static_str {
     ($s:literal) => {
-        $crate::Str::new_const($s)
+        // `const { ... }` block guarantees evaluation at compile time
+        const { $crate::Str::new_const($s) }
     };
 }