To add code owners to have default code reviewer for testcases (sonic-net#8482)

What is the motivation for this PR?
To assign code owner for default code reviewer based on feature sets.

How did you do it?
Change the .github/CODEOWNERS to have owners.

How did you verify/test it?
N/A

Author: StormLiangMS

.github/CODEOWNERS

@@ -36,3 +36,17 @@ tests/qos/files/dynamic_buffer_param.json @neethajohn @stephenxs
 tests/qos/files/mellanox @stephenxs @keboliu
 tests/qos/args @neethajohn @stephenxs
 tests/common/mellanox_data.py @keboliu @Junchao-Mellanox
+tests/dhcp_relay @jcaiMR
+tests/bgp @jcaiMR @StormLiangMS
+tests/route @jcaiMR
+tests/fib @jcaiMR
+tests/ip @jcaiMR
+tests/ipfwd @jcaiMR
+tests/radv @jcaiMR
+tests/fdb @jcaiMR
+tests/pfcwd @lipxu @neethajohn
+tests/lldp @ZhaohuiS
+tests/cacl @ZhaohuiS
+tests/dualtor @lolyu @wsycqyz
+tests/dualtor_io @lolyu @wsycqyz
+tests/dualtor_mgmt @lolyu @wsycqyz