net: add bpf_is_local_ipaddr bpf helper function

hulk inclusion
category: feature
bugzilla: NA
CVE: N/A

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Some network acceleration solutions, such as sockmap, are valid only for
internal packets of the local host. The bpf_is_local_ipaddr() bpf helper
function is added so that the ebpf program can determine whether a packet
is an internal packet of the local host.

Signed-off-by: Liu Jian <liujian56@huawei.com>