[BUGFIX] Set column width for table grids in page module

The backend layout representation in the backend implements a table
based layout. While the columns spanning was interpreted correctly,
the definition of how wide a column is in the defined grid was missing,
causing the cells to take up an unexpected amount of space.

Resolves: #101041
Resolves: #100961
Related: #97306
Related: #94629
Releases: main, 12.4
Change-Id: I8ab426e0c6e136135bf1bcf6bcc0368f76d4f4b0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79827


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>