[Backport 10.x.x] Merge Hd/bugfix #4388 (#4401)

* [HDRP][DXR] Add coverage for lighting full screen debug mode in DXR Tests Projects (#4391)

* 5 new lighting debug mode scene

* RTAO + SSShadows

* build settings

* Light Cluster scene

* Contact shadows correct captures using BackBuffer

* ContactShadow scene

* forgot meta files

* Added information about ray tracing light culling (#4392)

* Added ray tracing light culling section and moved a couple of things around

* Update Ray-Tracing-Getting-Started.md

Co-authored-by: sebastienlagarde <[email protected]>

* Added more pages to help users with runtime usage #4394

* Disable DXR XR test (#4403)

* Add support for lighting full screen debug mode for HDRP tests #4367

* Update CHANGELOG.md

* Fix automated tests

* upgrade path tracing alpha test

* 5001 updated unreadable image

* update failing test scene

* Update failing scenes

* Changing geometry in 708/711 tests

It was not appearing for some reasons

* Tentative fix

* Debug 'debug test scene'

* Debug

* new DebugDisplaySettings

* revert static variable to private

* Disable debug test scenes and reverting changes

Co-authored-by: Rémi Chapelain <[email protected]>
Co-authored-by: Lewis Jordan <[email protected]>
Co-authored-by: Remi Chapelain <[email protected]>

Author: 3 people