LU-16994 kfilnd: Add work queue parameters

LU-16994 kfilnd: Add work queue parameters

Added kfilnd work queue parameters to allow tuning.

The wq_high_priority parameter enables the work queue to run
as high priority. Default is enabled.

The wq_cpu_intensive parameter enables the work queue to run
as cpu intensive. Default is disabled.

The wq_max_active parameter sets the max in-flight work items
of the work queue. Default is 512.

The prov_cpu_exclusive parameter enables reserving one of a
CPT's CPUs for the exlusive use of the kfabric provider.
Default is disabled.

Test-Parameters: trivial
HPE-bug-id: LUS-11605
Signed-off-by: Ron Gredvig <ron.gredvig@hpe.com>
Change-Id: Ic4db95787a864efca3ea1234953ce3ea828f3594
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51786
Reviewed-by: Ian Ziemba <ian.ziemba@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>