Objecter::_recalc_linger_op: resend for any acting set change

Fixes: #9220
Backport: firefly
Signed-off-by: Samuel Just <sam.just@inktank.com>
(cherry picked from commit 1349383ac416673cb6df2438729fd2182876a7d1)

Conflicts:

	src/osdc/Objecter.cc
	src/osdc/Objecter.h