LeAudio: Fix the confusing logs

 - on state machine timeout debug-print the group details before
   altering the group state,
 - fix the misleading print about using Uni-Directional CIS, when in
   reality Bi-Directional CIS is used.

Bug: 361518110
Test: atest bluetooth_le_audio_client_test
Flag: EXEMPT; no functional change
Change-Id: I47d28fac1801dfe9521c5cad85496da41d33eb7c