move passing stage1 compile error tests to stage2

test/cases/compile_errors/declaration_between_fields.zig

@@ -0,0 +1,24 @@
+const S = struct {
+    const foo = 2;
+    const bar = 2;
+    const baz = 2;
+    a: struct {
+        a: u32,
+        b: u32,
+    },
+    const foo1 = 2;
+    const bar1 = 2;
+    const baz1 = 2;
+    b: usize,
+};
+comptime {
+    _ = S;
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :9:5: error: declarations are not allowed between container fields
+// :5:5: note: field before declarations here
+// :12:5: note: field after declarations here