rgwlc: fix Segmentation Fault related to tags.

rgwlc: fix Segmentation Fault related to tags.

It is found that rgw crashes when putting a tag beyond the rule to the object, which can be solved by adding the return value judgment.

Fixes: https://tracker.ceph.com/issues/46485
Signed-off-by: zhuo li <lizhuo@chinatelecom.cn>
Signed-off-by: yupeng chen <chenyupeng@chinatelecom.cn>
(cherry picked from commit 5994ec12a7039f21b8f9e1077f2f721003de8cb6)

Conflicts:
	src/rgw/rgw_lc.cc
- automated cherry-pick failed due to post-nautilus refactoring:
  made the change manually