LU-13569 lnet: Deprecate lnet_recovery_interval

LU-13569 lnet: Deprecate lnet_recovery_interval

We no longer use a static recovery interval, so remove its remaining
uses and add warning that it has been deprecated.

Lustre-change: https://review.whamcloud.com/39722
Lustre-commit: 79ab0535622782c82636cee47918dc4b19983144

Test-Parameters: trivial
HPE-bug-id: LUS-9109
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Iedc79803ef5b7ba041a531961eb77acd338abfb5
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/54404
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>