[5.2] Remove get()/set() calls to table classes

[Hackwar]

Summary of Changes

We currently are still using the LegacyPropertyManagementTrait in our Table classes and use the get()/set() methods in the code. This PR removes those calls to these two methods to remove deprecated code.

Testing Instructions

Codereview.

Link to documentations

Please select:

• [ ] Documentation link for docs.joomla.org:

• [X] No documentation changes for docs.joomla.org needed

• [ ] Pull Request link for manual.joomla.org:

• [X] No documentation changes for manual.joomla.org needed

[chmst]

I have tested this item :white_check_mark: successfully on 621a3aafab16314d268d27c1a363c8afa9c116e8

Code review

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[laoneo]

Thanks!