This commit adds a new job 'benchmark' to the build.yml wrokflow, the
benchmark workflow will run the make benchmark target. The Dco check
needs to run on every code change regardless of whether it is a
documentation or code change hence seperating it out into a different
workflow, this will run for all pull and merge requests

Signed-off-by: Arjun Raja Yogidas <arjunry@amazon.com>

This commit adds additional details like standard deviation,mean,p90
etc.. for individual events - 'Pull','Run Task 1' and 'Run Task
2(Running task without FUSE overhead)'

Signed-off-by: Arjun Raja Yogidas <arjunry@amazon.com>