adjust to istio 1.12.7

[huanghuangzym]

fix for aeraki-mesh/aeraki#222

aeraki contrl plane have already adjust to istio 1.12.7

but meta-protocol-proxy build with envoy 1.18 (istio 1.10)

this pr is used to adjust to envoy 1.20(istio 1.12)

[huanghuangzym]

envoyproxy/envoy@v1.18.6...v1.20.3
between envoy 1.18.6 and 1.20.3
some files move dirs
some interfce has changed
version-convert lib removed

[zhaohuabing]

@huanghuangzym thanks for your contrition. This pr is great.

Without CI and auto testing, I'll have to pull your branch and test locally. It may take some time to get this PR approved.

Now CI becomes a roadblock for our PR reviews. Hope some one could help on it.

[huanghuangzym]

@huanghuangzym thanks for your contrition. This pr is great.

Without CI and auto testing, I'll have to pull your branch and test locally. It may take some time to get this PR approved.

Now CI becomes a roadblock for our PR reviews. Hope some one could help on it.

yes ,CI is needed, we should use github action to build it as soon as?
i build it in local,and run some protocol test is ok, and i think it must need more test (we will run more test in alauda )
if any question , anyone can add commit to this branch

[smwyzi]

LGTM

[zhaohuabing]

LGTM