This Commit fixes failing system tests in ISIS powder polaris.

re: #28415

The tests include a check for the line numbers that an error occurs
on. The removal of the import future has reduced these values by 2.

Removes all of the from __future__ imports that open and close the
brackets on the same line. This is most of them.

This commit adds an option to rebin the focused/merged workspace with a delta_q paramiter in polaris create pdf.

re: #28415

This commit changes the method of rebinning the output pdf from Polaris create pdf to use delta_r (as used in the PDFFourierTransform algorithm) instead of the rebin algorithm.

This commit removes a print statement initial added for debugging that was missed on cleaning up before pushing.

This commit adds release notes detailing the change of output names from Polaris.create_total_scattering_pdf

re: #28414

This commit adds lines in generate_ts_pdf to change the names of the workspaces produced as a result from the function.

re: #28414

Co-Authored-By: StephenSmith25 <56431339+StephenSmith25@users.noreply.github.com>

Needed to add checks around makedirs(), throws an error if the directory
already exists.

Also updated class_maker.py