Feature: #93591 - Allow group id lookup in conditions with array operator 

See forge#93591

Description 

In the backend and frontend the array of user group ids of the current backend user is now available as backend.user.userGroupIds .

In the frontend the array of user group ids of the current frontend user is available as frontend.user.userGroupIds .

Impact 

This allows for a native Symfony Expression Syntax in TypoScript conditions, e.g.

[4 in frontend.user.userGroupIds]

[2 in backend.user.userGroupIds]

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With this syntax you can match backend user groups in the frontend without a "like" expression on the comma-separated list of user group ids.