LU-14288 nodemap: Use nidmasks for IPv6 NIDs

LU-14288 nodemap: Use nidmasks for IPv6 NIDs

Using nidmasks for nodemap ranges allows us to specify more than one
IPv6 NID in a range. In range_create(), we construct a string
representing a nidmask based on the specified NID and netmask. This
is passed to cfs_parse_nidlist(), and the resulting nidlist is stored
in lu_nid_range::rn_nidlist. cfs_match_nid() is used in range_find()
and range_search() to locate appropriate ranges.

Test-Parameters: trivial
Test-Parameters: testlist=sanity-sec env=FORCE_LARGE_NID=true,LOAD_MODULES_REMOTE=true
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Ib1f60eda6fbc9d0214b6c63dcc8656eab3977a8b
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56184
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>