Use path instead of re_path for all URLs

[will-moore]

I was reminded in prep for recent Web workshops that the Django recommended way of defining URLs is with path() function rather than re_path() and has been so since Django 3.2 at least. E.g. see https://docs.djangoproject.com/en/4.2/topics/http/urls/

This updates OMERO.figure to use path() as a first step. Can think about omero-web and other apps too...

Expect no change in functionality.

To test all URLs...

• [x] Go To /figure/open - open a new figure (list Files and thumbnails OK)
• [x] Go To /figure/new - Add a new image to figure
• [x] Save the Figure
• [x] Test rendering of Big images
• [x] Delete a figure
• [x] Add an image with timestamps to figure, check timestamps are loaded `timestamps/?image=id
• [x] Move figure to another group
• [x] figure/z_scale/?image=id
• [x] figure/roiCount//
• [x] figure/recover/
• [x] figure/roiRectangles/image_id
• [x] figure/unit_conversion////',

[jburel]

This PR should probably be included in the upcoming 7.0.0

[will-moore]

@jburel I have just checked all the features/URLs above which covers all URLs on merge-ci.