Refactor HttpAPIClientHelper to improve response cleanup handling. Logging for unexpected exceptions

Author: aleksei-griaznov

client-v2/src/main/java/com/clickhouse/client/api/internal/HttpAPIClientHelper.java

@@ -475,6 +475,7 @@ public ClassicHttpResponse executeRequest(Endpoint server, Map<String, Object> r
             throw e;
         } catch (Exception e) {
             closeQuietly(httpResponse);
+            LOG.debug("Failed to execute request to '{}': {}", server.getBaseURL(), e.getMessage(), e);
             throw e;
         }
     }