LeAudio: Rename codec configuration struct

Since this LTV types are defined as egeneral types
which are not LC3 specific, this struct is also not
LC3 specific.

Bug: 295972694
Test: atest --host bluetooth_le_audio_test bluetooth_le_audio_client_test bluetooth_test_broadcaster bluetooth_test_broadcaster_state_machine bluetooth_le_audio_codec_manager_test
Change-Id: I51553313246ee04ea7582555ad1bf6ea8bf4cc92