[mosquitto]: Update the brokerless example to use esp-peer (IDFGH-14636)

[david-cermak]

Answers checklist.

• I have read the documentation for esp-protocols components and the issue is not addressed there.
• I have updated my esp-protocols branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Currently the brokerless mosquitto example uses libjuice to establish peer to peer connection.
Update the example to use esp_peer since it's the official Espressif solution.