Fix, build and test the energy profiler daemon

[ethan-puyaubreau]

Follow-up to #300: no target builds the daemon, and it does not compile (std::chrono::duration needs template arguments).

• Take the interval as std::chrono::nanoseconds, so milliseconds, microseconds or seconds convert to it implicitly.
• Build the daemon as a static library, kp_energy_profiler_daemon.
• Run the daemon on a std::jthread: stop() requests a stop that wakes the thread instead of waiting up to a full interval, and destroying a running daemon stops it instead of calling std::terminate. ThreadSanitizer reported a data race on running_ before.
• Schedule runs on steady_clock: high_resolution_clock is system_clock in libstdc++.
• Add the unit tests asked for in the review of Energy profiling tools: Add Daemon class for periodic task execution #300.

Tested on my fork against Kokkos 5.0.2 and develop.

[JBludau]

you can even use c++20 and jthread now

[ethan-puyaubreau]

Indeed, that was the plan from #300 once we had C++20! Switched to std::jthread in 8f4af23: request_stop now wakes and stops the thread, and the jthread joins itself, so the hand-written stop signaling and the destructor are gone.

[JBludau]

Thanks Ethan!