L515 - Add temperature fetcher thread

[Nir-Az]

L515 only

Periodic read of temperatures and noise estimation values once depth sensor is on.
a precondition for reflectivity tool + max range [RS5-9263]

Description:

• A new temperature fetcher thread is created on depth sensor start and closed on stop.
• All of temperature clients get it from a "get_temperatures" new function
• get_temperatures function return the protected fetcher values or read directly from the FW is no fresh values from the thread
• N-Est values are exposed only on FW ver > 1.5.0.0

TBD - UT should be added in the future.