perf: Avoid boxing in ContainerVisual.SetMatrixDirty

[Youssef1313]

GitHub Issue (If applicable): closes #

PR Type

What kind of change does this PR introduce?

What is the current behavior?

The scenario being profiled is rapid window resizing, which will keep invalidating render.

Previously, this caused a lot of boxing and also SetMatrixDirty is taking up a lot of CPU time.

What is the new behavior?

Boxings are gone completely, and SetMatrixDirty is taking much less CPU time.

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] Docs have been added/updated which fit documentation template (for bug fixes / features)
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Validated PR Screenshots Compare Test Run results.
• [ ] Contains NO breaking changes
• [ ] Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• [ ] Commits must be following the Conventional Commits specification.

Other information

Internal Issue (If applicable):

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