refactor: Pass wallet database into CWallet::Create

No changes in behavior

src/wallet/bdb.cpp

@@ -359,7 +359,6 @@ void BerkeleyDatabase::Open(const char* pszMode)
             if (ret != 0) {
                 throw std::runtime_error(strprintf("BerkeleyDatabase: Error %d, can't open database %s", ret, strFile));
             }
-            m_file_path = (env->Directory() / strFile).string();
 
             // Call CheckUniqueFileid on the containing BDB environment to
             // avoid BDB data consistency bugs that happen when different data