fix: resolve -Wdelete-non-abstract-non-virtual-dtor warnings

Author: kwvg

src/coinjoin/coinjoin.h

@@ -317,6 +317,7 @@ class CCoinJoinBaseSession
     int nSessionDenom{0}; // Users must submit a denom matching this
 
     CCoinJoinBaseSession() = default;
+    virtual ~CCoinJoinBaseSession() = default;
 
     int GetState() const { return nState; }
     std::string GetStateString() const;

src/versionbits.h

@@ -107,13 +107,16 @@ class AbstractEHFManager
 public:
     using Signals = std::unordered_map<uint8_t, int>;
 
+public:
+    AbstractEHFManager() = default;
+    virtual ~AbstractEHFManager() = default;
+
     /**
      * getInstance() is used in versionbit because it is non-trivial
      * to get access to NodeContext from all usages of VersionBits* methods
      * For simplification of interface this methods static/global variable is used
      * to get access to EHF data
      */
-public:
     [[nodiscard]] static gsl::not_null<AbstractEHFManager*> getInstance() {
         return globalInstance;
     };
@@ -127,7 +130,6 @@ class AbstractEHFManager
      */
     virtual Signals GetSignalsStage(const CBlockIndex* const pindexPrev) = 0;
 
-
 protected:
     static AbstractEHFManager* globalInstance;
 };