[Bug] [Seatunnel-web] Create log directory if it does not exist.

[arshadmohammad]

Creating logs directory if it does not exist.

Purpose of this pull request

Check list

• Code changed are covered with tests, or it does not need tests for reason:
• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs

[arshadmohammad]

After the seatunnel-web starts succesfully
% sh bin/seatunnel-backend-daemon.sh start -d starting seatunnel... Load connectors from /some/path/install/seatunnel /some/path/install/seatunnel-web/bin seatunnel started seatunnel-web %