update git-lfs to 2.3.1

What does this MR do?

This MR updates git-lfs binary from 2.1.1 to 2.3.1 in helper docker image

Why was this MR needed?

Important bug fixes was added to git-lfs since 2.1.1 release.

For example we encountered the following bugs in git-lfs:

• Retry on timeout or temporary errors
• git-lfs died on signal when clone large repository

Are there points in the code the reviewer needs to double check?

Please review git-lfs changelog

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Tests
  • Added for this feature/bug
  • All builds are passing
• Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?