LeAudio: Improve codec spec. capabilities type names

To make sure codec capabilities LTV types are not confused with configuration
LTV types the former one names are now matching the names from the
official BT assigned numbers specification.

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: I2c7a2738f66a625f7d133e24e73fe6d271dcf502