[202205]implement staticroutebfd process#13764

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qiwang4 wants to merge 6 commits intosonic-net:202205from

qiwang4:staticroutebfd

Commits on Feb 10, 2023

implement staticroutebfd process
qiwang4
committed

Commits on Mar 3, 2023

fix some known issues
qiwang4
committed

Commits on May 19, 2023

double commit 13789 from master branch
baorliu
committed

Commits on May 31, 2023

[static_route][staticroutebfd]fix an issue on deleting a non-bfd static route
baorliu
committed
remove staticroutebfd from critical_processes and make it auto restart
baorliu
committed
[202205][staticroute][bfd]add testcase for nexthop-vrf list
baorliu
committed