share_pool: Implement sp_group_del_task()

ascend inclusion
category: Feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4NDAW


CVE: NA

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This interface is added to support the function of
exiting a process from a sharing group.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>
Signed-off-by: Guo Mengqi <guomengqi3@huawei.com>
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: Kefeng <Wang&lt;wangkefeng.wang@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>