Add Sleep Test for 50ms.
Fix Sleep under linux that was using microseconds as nanoseconds.
Factor timespec creation to template function using div/mod and nanoseconds
from duration cast.
Test logical_processor_count() 3 times to test static return value stays
correct.
Run EnableAffinityConfiguration(). No asserts possible.
Test setting thread id, test using uint32_t max to reset.
Test setting thread name. No asserts possible.
Test running MaybeYield(). No obvious more complex test case.
Test running SyncMemory(). No obvious more complex test case.
