[7.x.x Backport] Added backport to handle all shader features for every RP active in p…

[Nzollner]

…roject

Guide : https://github.com/Unity-Technologies/Graphics/blob/pr-template-correction/.github/pr-read.png.md

Display Addon : https://userstyles.org/styles/182991/unity-graphics-pr-readme

Purpose of this PR

This is a backport from: Unity-Technologies/ScriptableRenderPipeline#5972

Why is this PR needed, what hard problem is it solving/fixing?
The purpose of this PR is to take all URPs into consideration when checking for supported features instead of a singe URP.

Testing status

Manual Tests

What have you tested?
I have tested if there are no unintentional stripping of shader variants.
This is check to looking at the visuals and checking of the shader cache is the expected size.

Automated Tests

What did you setup? (Add a screenshot or the reference image of the test please)

Links

Yamato: (Select your branch) https://yamato.prd.cds.internal.unity3d.com/jobs/902-Graphics

Any test projects or documents to go with this to help reviewers?

Comments to reviewers

Notes for the reviewers you have assigned.

[phi-lira]

Dont' need to rerun ABV. merge just changed changelog.md