Fixed bug when reading dataset with timestamp for sasrec model

[gazon1]

Description

When reading dataset with timestamp sasrec model would never use timestamp and it would crash with an error when splitting dataset with timestamp

Related Issues

References

Checklist:

• [ ] I have followed the contribution guidelines and code style for this project.
• [ ] I have added tests covering my contributions.
• [ ] I have updated the documentation accordingly.
• [ ] This PR is being made to staging branch and not to main branch.

[miguelgfierro]

Hi @gazon1, would you mind changing the PR to staging, and signing the commit?

[miguelgfierro]

All the test pass: https://github.com/recommenders-team/recommenders/pull/2060 merging this PR