tests: Add replacement policy tests

Add tests to test the correctness of replacement policies using
TrafficGen.
Enable debug-flags to print the hit and miss messages so that you
can compare the results with the comments in the tests. Even though
the tests are targeting specific replacement policies, they can be
reused to test all replacement policies.

Change-Id: I3a8013fbcb19adae25b0818ac9e4b0be60be0689
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/60389
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
88 files changed