abstraction-map: Add cpu.cfs_{quota,period}_us <-> cpu.max mapping

abstraction-map: Add cpu.cfs_{quota,period}_us <-> cpu.max mapping

Add custom functions to map cpu.cfs_quota_us <-> cpu.max and
cpu.cfs_period_us <-> cpu.max.  These mappings can be 1->N or
N->1 and utilize custom values for limits, "-1" in cgroup v1
and "max" in cgroup v2.

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Reviewed-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>