[Backport 2021.1] [HDRP] Backport various PR (#4396)

* [10.x.x HDRP] Fix issue with raytracing resources not properly initialize (#4268)

* draft

* Fix build DXR

* Match behavior with the one in master

* Updated ray tracing settings and added it to the table of contents  (#4279)

* Updated ray tracing settings and added it to the toc

* Removed hyphens from rtss toc entry

* Fix shader warning when using Lanczos upsampling (#4280)

* Added DOTS_INSTANCING_ON variants to the "HDRP/Decal" shader #4284

* [HDRP] Fp16_PPAlpha Panini projection, Motion Blur test and moved other Fp16Alpha scenes to one #4290

* [HDRP] Fix undo of some properties on light editor #4293

* Opt-out of builtin auto baking of ambient/reflection probe. #4324

* Revert "Opt-out of builtin auto baking of ambient/reflection probe. #4324"

This reverts commit 719e835.

* Hd/redo fix inputregistering domainreload (#4358)

* Update InputRegistering.cs

* Remove asset modification if InputSystem package is in use

* Prevent missuse of InputRegistering while InputSystem package is in use

* cleaning

* more cleaning

* Update code to use Next instead of GetArrayElementAtIndex

* Fix strange out of range error

Co-authored-by: Lewis Jordan <[email protected]>
Co-authored-by: Pavlos Mavridis <[email protected]>
Co-authored-by: Andrew Saraev <[email protected]>
Co-authored-by: TomasKiniulis <[email protected]>
Co-authored-by: Adrien de Tocqueville <[email protected]>
Co-authored-by: JulienIgnace-Unity <[email protected]>
Co-authored-by: Remi Slysz <[email protected]>

Author: 8 people