LeAudio: Improve data path setup

The data path configuration should be provided by the audio set
configuration provider. For now, these are based on the current
codec location (either HOST or ADSP). In future this should
be provided from the vendor interface over the AIDL.

Bug: 295972694
Test: atest bluetooth_le_audio_test bluetooth_le_audio_client_test bluetooth_test_broadcaster bluetooth_test_broadcaster_state_machine
Change-Id: If39a1d1ac089f236e4ed9258644c197a57f1e723