codeowners: update codeowners of andes_v5 SoC series

Add Andes developers, kevinwang821020 and jimmyzhe as reviewers for
andes_v5 soc, board, dts, and drivers.

Remove Teng-Shih-Wei from reviewers because he doesn't maintain
Zephyr RTOS currently.

Signed-off-by: Jim Shu <cwshu@andestech.com>
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