chore(radio): Reduce size of the data structures in FLASH storage (#3979)

* Reduce size of the YamlNode structure in FLASH storage.
Fix compiler warning.

* Further reduction of FLASH used by YamlNode structures.

* Reduce size of sensor definition arrays and audio tone volumes array.

radio/src/storage/yaml/yaml_datastructs_funcs.cpp

@@ -2162,7 +2162,7 @@ static void r_serialMode(void* user, uint8_t* data, uint32_t bitoffs,
   auto tw = reinterpret_cast<YamlTreeWalker*>(user);
 
   auto node = tw->getAttr();
-  if (!node || node->tag_len < 4) return;
+  if (!node || node->tag_len() < 4) return;
 
   uint8_t port_nr;
   if (node->tag[3] == 'S')