Bluetooth: BAP: Shell: Scan Delegator: Replace sync_state_get_by_sync_info with PAST service data

[Thalley]

Summary

The PAST service data should contain information about which receive state that it is for, which is a much better solution that relying on the address, as the address in the receive state may not be equal to the address from PAST if privacy is used.

Describe the solution you'd like

Once #95487 is implemented, update the usage of sync_state_get_by_sync_info to use the PAST service data src_id instead to lookup the sync state.

Alternatives

No response

Additional Context

No response