release: update version file for v1.8.0-rc5

Signed-off-by: David Ko <dko@suse.com>

release: update version file for v1.8.0-rc4

Signed-off-by: David Ko <dko@suse.com>

release: update version file for v1.8.0-rc3

Signed-off-by: David Ko <dko@suse.com>

fix: close engine client in error path to avoid a leak

Signed-off-by: James Munson <james.munson@suse.com>
(cherry picked from commit 01fe64a)

# Conflicts:
#	controller/backup_controller.go

chore: update the comment in environment_check_monitor.go

Longhorn 10106

Signed-off-by: Derek Su <derek.su@suse.com>

fix(deps): update github.com/longhorn/go-iscsi-helper digest to 7e19304

fix(deps): update github.com/longhorn/go-iscsi-helper digest to 7e19304

release: update version file for v1.6.4

Signed-off-by: David Ko <dko@suse.com>

release: update version file for v1.6.4-rc2

Signed-off-by: David Ko <dko@suse.com>

release: update version file for v1.8.0-rc2

Signed-off-by: David Ko <dko@suse.com>