Add disableClipStyle to BranchState

[andremig-bentley]

This PR is to address this issue: /~https://github.com/iTwin/itwin-graphics-backlog/issues/343

An optional disableClipStyle boolean has been added to GraphicBranchOptions, BranchStateOptions, BranchState, and RealityMeshParams. If set true, any clip in the branch will override the view's DisplayStyleSettings.clipStyle, and instead, no ClipStyle.insideColor or ClipStyle.outsideColor will be applied to the clip. This is accomplished within BranchUniforms every time a new branch is pushed to the stack by setting the alpha values of ClipStack.insideColor, ClipStack.outsideColor, and ClipStack.intersectionStyle to 0 if disableClipStyle is true. Otherwise, it is left to the viewport's DisplayStyleSettings.clipStyle to determine these values.

This is being applied to fix the above bug by overriding the clip style in branches created for rendering map tiles in MapTile.ts, and then passing that information along through RealityMeshParams.

[andremig-bentley]

Since this PR is not critical, we will wait until @pmconne returns to office next week and has a chance to look at it before merging it in.

[pmconne]

Missing tests.

[andremig-bentley]

Missing tests.

A unit test has been added to BranchUniforms.test.ts which will test whether or not the clip style is successfully disabled when a branch with disableClipStyle set to true is pushed to the stack.

[mergify]

This pull request is now in conflicts. Could you fix it @andremig-bentley? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

[andremig-bentley]

Final step before merging is to figure out why rush cover is consistently failing on the RPCInterface - should set cache-control headers when applicable test and solve that issue if necessary.

[toddsouthenbentley]

@Mergifyio backport release/4.9.x

[mergify]

backport release/4.9.x

✅ Backports have been created

• #7254 Add disableClipStyle to BranchState (backport #7109) [release/4.9.x] has been created for branch release/4.9.x but encountered conflicts