Bluetooth:controller: Implement support for Advanced Scheduling in refactored LLCP

[erbr-ot]

Advanced scheduling is not yet supported in refactored LLCP, and it should be
Also a test for this needs to be added, for example based on the babblesim test for 250 simultaneous connections

see pr #51239

[kruithofa]

From F2F in august 2022:
Action item:

• Enable auto-connection update via Kconfig so that correct behaviour is tested in babblesim test
• Find who will implement this behaviour?