test(datatable): add @avt tests

[tay1orjones]

Closes #14118

Changelog

New

• add new avt tests for every datatable storybook story

Changed

• updated a few stories to pass accessibility-checker

Testing / Reviewing

• Checks should pass, double check the tests make sense

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[tw15egan]

@tay1orjones should we include some basic keyboard navigation tests here as well? Can probably capture most of them in the Dynamic story

[tay1orjones]

@tw15egan Good call, I just pushed up a big block of keyboard nav related tests. This PR also now updates to the latest version of playwright so that we can use .all() to iterate through multiple elements if more than one matches a query. If testing locally (and when developing after this PR is merged) you'll need to run yarn install and then npx playwright install.

[tw15egan]

Looks great! Just had a few comments that can be addressed separate to this PR