SHV updates, final time for Linux RT and SHV reset after firmware update fixes

[ppisa]

This version fixes problems with pyshv mainline version 0.10+ caused by incomplete decoding of the requests. The stop on final time on Linux RT target has been broken during previous SHV introspection and reconnection to server related changes. It is fixed now. The problem with dangling connection at the Rust silicon-heaven broker leftover from immediate reset has been solved by closing connection before reboot and model/firmware updates are fully functional on NuttX now.