mem-ruby: Remove Bloom Filters' ruby dependency

mem-ruby: Remove Bloom Filters' ruby dependency

Substitute the common ruby header by base's bitfield to
eliminate all ruby dependency in Bloom Filters.

As a side note, BulkBloomFilter now assumes addresses are
64 bit long.

Change-Id: Ibdb1f926ddcc06c848851c1e6a34863541808360
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18738
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>