osd: make osd_fast_shutdown_notify_mon option true by default

osd: make osd_fast_shutdown_notify_mon option true by default

osd_fast_shutdown_notify_mon option is false by default. So users suffer
from error log flood, slow ops, and the long I/O timeouts on voluntary OS
shutdown before they are aware of the existence of this option. Let's
make this option true by default.

Fixes: https://tracker.ceph.com/issues/53328
Signed-off-by: Satoru Takeuchi <satoru.takeuchi@gmail.com>
(cherry picked from commit 729a5b85a6586b47d16acbba2cf8e765e498cd65)

 Conflicts:
	src/common/options/global.yaml.in
		- global.yaml.in does not exist in Pacific; rather,
		  these configs were handled in options.cc.