[TASK] Add missing grunt copy action for web-animate polyfill

Commands executed:
    yarn add web-animate
    yarn build

Releases: main
Resolves: #96410
Related: #91072
Related: #96323
Change-Id: Id4c06262af9122c638861e798b1f9bfade8ee56f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72754


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>