tests: include: Move timestamp.h into common location

These were part of latency_measure benchmark, but was
used in all benchmarks.

legacy symbols in timestamp.h were replaced to unified
ones. Tick based checks have been replaced with ms based
checks in line with the new APIs.

Change-Id: I1d27310023be4cafbceccf50cb87d72b6681443d
Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>