uprobe: add UPROBE_ALTER_PC flag for uprobe

openeuler inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I61AXT


CVE: NA

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Within uprobe handlers, the pc register could be
modified. In this situation, there is no need to
do a single stepping. Just like the kprobe, we
skip it.

Signed-off-by: Longjun Luo <luolongjun@huawei.com>