Add disableClipStyle to BranchState (backport #7109) [release/4.9.x]

[mergify]

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.

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This is an automatic backport of pull request #7109 done by Mergify.

[mergify]

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Changes to be committed:
	modified:   common/api/core-frontend.api.md
	new file:   common/changes/@itwin/core-frontend/andremig-clipstyle-bug_2024-08-26-17-00.json
	modified:   core/frontend/src/render/GraphicBranch.ts
	modified:   core/frontend/src/render/RealityMeshGraphicParams.ts
	modified:   core/frontend/src/render/RenderSystem.ts
	modified:   core/frontend/src/render/webgl/BranchState.ts
	modified:   core/frontend/src/render/webgl/BranchUniforms.ts
	modified:   core/frontend/src/render/webgl/RealityMesh.ts
	modified:   core/frontend/src/test/render/webgl/BranchUniforms.test.ts
	modified:   core/frontend/src/tile/map/MapTile.ts

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   core/frontend/src/render/webgl/Graphic.ts

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