cxx/esp_hw_support: added build test, changed parameter types

Changed rv_utils_intr_edge_ack and esp_cpu_intr_edge_ack to
take uint32_t instead of int to avoid build errors.

The test is to test in particular that __builtin_ffsll, used in
xt_utils.h, which is included via esp_cpu.h, compiles fine
in C++20 with -Wsign-conversion enabled.

Closes https://github.com/espressif/esp-idf/pull/10895

components/esp_hw_support/include/esp_cpu.h

@@ -413,9 +413,9 @@ FORCE_INLINE_ATTR void esp_cpu_intr_edge_ack(int intr_num)
 {
     assert(intr_num >= 0 && intr_num < SOC_CPU_INTR_NUM);
 #ifdef __XTENSA__
-    xthal_set_intclear(1 << intr_num);
+    xthal_set_intclear((unsigned) (1 << intr_num));
 #else
-    rv_utils_intr_edge_ack(intr_num);
+    rv_utils_intr_edge_ack((unsigned) intr_num);
 #endif
 }