LU-9859 libcfs: migrate hash table to obdclass

LU-9859 libcfs: migrate hash table to obdclass

The lustre specific hash is only used by the Lustre layer so it
doesn't make sense to keep it in libcfs. Move the hash code to
obdclass. Once ldlm resource hashtable moves to rhashtabble this
be server only code.

Test-Parameters: trivial
Change-Id: I676f6a3decf17e0e90cd747ad4bb4c4d16a52a30
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57945
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>