fix(ll): fix cpp compile error

Merges https://github.com/espressif/esp-idf/pull/12093

fix(ll): remove FLAG_ATTR macro

Such kind of operator overload will not work because C++ thinks such overload is ambiguous and it still prefer the built-in one which accepts and returns integer. Manually force type conversion seems to be unavoidable.

components/esp_common/include/esp_assert.h

@@ -9,6 +9,7 @@
 #include "assert.h"
 
 /* Since IDF v5.0, C17 standard is used, which supports both _Static_assert and static_assert syntax */
+/* Please do not use `_Static_assert` for C++ compatibility */
 #define ESP_STATIC_ASSERT static_assert
 
 /* Assert at compile time if possible, runtime otherwise */