move passing stage1 compile error tests to stage2

test/cases/compile_errors/setAlignStack_set_twice.zig

@@ -0,0 +1,11 @@
+export fn entry() void {
+    @setAlignStack(16);
+    @setAlignStack(16);
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :3:5: error: multiple @setAlignStack in the same function body
+// :2:5: note: other instance here