[LU-11408] propagate grant shrink interval immediately

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0
• Affects Version/s: Upstream
• Assignee: Alex Zhuravlev
• Reporter: Alex Zhuravlev

Description

it's possible to set grant shrink interval with lctl, but it's not propagate quickly.

by default it's 20 minutes, to it will take 20 minutes for a new interval to be used.