Refactor: Move SetupGeneration code out of CWallet

This commit does not change behavior.

src/wallet/scriptpubkeyman.h

@@ -159,6 +159,12 @@ public:
     //! Mark unused addresses as being used
     virtual void MarkUnusedAddresses(const CScript& script) {}
 
+    /** Sets up the key generation stuff, i.e. generates new HD seeds and sets them as active.
+      * Returns false if already setup or setup fails, true if setup is successful
+      * Set force=true to make it re-setup if already setup, used for upgrades
+      */
+    virtual bool SetupGeneration(bool force = false) { return false; }
+
     /* Returns true if HD is enabled */
     virtual bool IsHDEnabled() const { return false; }
 
@@ -276,6 +282,8 @@ public:
 
     bool IsHDEnabled() const override;
 
+    bool SetupGeneration(bool force = false) override;
+
     bool Upgrade(int prev_version, std::string& error) override;
 
     bool HavePrivateKeys() const override;