[TASK] Streamline field order and tabs for be_users

TCA fields for be_users currently look unordered and not
logically structured compared to fe_users.

This change moves the `disable` field to the `access` tab
and adds the new tab `Personal Data` which contains the
fields  `realName`, `email` and `avatar`.

Resolves: #99432
Releases: main
Signed-off-by: Torben Hansen <derhansen@gmail.com>
Change-Id: I92a8277dc4483011b4dd2e54e2cbbacdc9510fef
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77236


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Guido Schmechel <guido.schmechel@brandung.de>