Gcc12 related fixes (#1138)

* GCC12 related fixes but still compiles on GCC9

* Suppress warnings about volatile +=

* Enable c++20 if supported by the compiler

On gcc12 we need to use -std=c++20 since constexpr .c_str() on std::string is only officially available since c++20 and the new gcc wouldnt let us use it with older standard

* code format

---------

Co-authored-by: Eisenberger Tamas <e.tamas@iwstudio.hu>

firmware/common/tpms_packet.hpp

@@ -60,6 +60,10 @@ class TransponderID {
         return id_;
     }
 
+    constexpr bool operator==(const TransponderID& other) const {
+        return id_ == other.id_;
+    }
+
    private:
     uint32_t id_;
 };