LU-17242 debug: remove CFS_CHECK_STACK

LU-17242 debug: remove CFS_CHECK_STACK

CFS_CHECK_STACK is primitive, doesn't work on
x86_64, and only dumps a stack in kernel log
when we are fairly close to passing the stack
limit anyway.

Admins and developers can grab the same info from
debug/tracing/stack_trace and debug/tracing/stack_max_size
on a live system. And the kernel will dump a stack
if it 'Oops' from going over the stack limit.

We don't need an additional Lustre specific stack
checking mechanism.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Icc7c82f6a0dcd727de6ce2c2d40ba071ee349c0c
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52883
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>