Restore attribute table tests that have been disabled for a while

due to my mistake in
https://github.com/qgis/QGIS/pull/53168/changes#diff-4a7addb15c37611abf9690c64cd4e0f65394658c67a5f29bbd1c564665cb81bdR55 [master] https://github.com/qgis/QGIS/commit/52d7b8544d7fa171abaa732f141a4a003338ac94

Merge pull request #64983 from troopa81/fix_geopdf_export_order

[GeoPdfExport] Use layer order for group layer children [master] https://github.com/qgis/QGIS/commit/0ba77818c32b8a4e2cb5e7496c13c7c09bd81433

Merge pull request #65308 from signedav/comments

Fix: Avoid the scientific notation (exponential form) for large values [master] https://github.com/qgis/QGIS/commit/b487059b4b0dcb49a42a06efc8f3008886749ff6

Merge pull request #65278 from 3nids/migration-setting

Migrate some settings to new API [master] https://github.com/qgis/QGIS/commit/19c7e480d7c042568e9b8b55c27084c7c79483fa

fix wrong folder created in sipify (#65302)

and cleanup

Co-authored-by: Denis Rouzaud <[email protected]> [release-4_0] https://github.com/qgis/QGIS/commit/6a83d98941612e47817de6d312e6c092f8e3365e