share_pool: Apply sp_group_id_by_pid() to multi-group-mode

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI


CVE: NA

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Since a process could be added to multiple groups, we should return an
array of spg_ids to cover all the groups.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>