ci: build proxyv2 image and push it to dockerhub

[seeflood]

Signed-off-by: seeflood zhou.qunli@foxmail.com

What this PR does:

• build proxyv2 image
• and then push it to dockerhub

reference:
https://mosn.io/docs/user-guide/start/istio/

todo:

• build layotto/proxyv2:latest image with make script
• build image in CI
• push to dockerhub in CI

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

Merging #655 (33b76da) into main (c232ee5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #655   +/-   ##
=======================================
  Coverage   60.92%   60.92%           
=======================================
  Files         120      120           
  Lines        6377     6377           
=======================================
  Hits         3885     3885           
  Misses       2120     2120           
  Partials      372      372           

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[Xunzhuo]

Generally LGTM, need to confirm that if we should add this to release pipeline?

[seeflood]

Generally LGTM, need to confirm that if we should add this to release pipeline?

@Xunzhuo Yes we do. Since I haven't deployed the image with istio, I'm not sure if I have to modify it again.
So I want to add it in release pipeline after building up the whole istio lab