fix(cdk/drag-and-drop): cdkDrag directive override transform styles

[Sagie501]

Fixes the bug that cdkDrag directive override transform styles on the root element

Fixes #18143

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[Sagie501]

@googlebot I signed it!

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[clabough]

What's the status of this? I want to be able to rotate the drag preview, but the root element transform gets overwritten if I use CSS.

[Gamelena]

This fix was accepted? if yes, in which version is dispossable? I had the same issue using @angular/[email protected]

[devversion]

Hey, please re-open the pull request if still valid. The PR got auto-closed by GitHub when we renamed our primary branch.

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