koord-runtime-proxy: support inject env in proxy

[ZYecho]

Signed-off-by: Yue Zhang huaihuan.zy@alibaba-inc.com

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

Merging #503 (5bec094) into main (239d812) will decrease coverage by 0.02%.
The diff coverage is 58.62%.

@@            Coverage Diff             @@
##             main     #503      +/-   ##
==========================================
- Coverage   68.06%   68.04%   -0.03%     
==========================================
  Files         152      152              
  Lines       16414    16435      +21     
==========================================
+ Hits        11173    11183      +10     
- Misses       4408     4421      +13     
+ Partials      833      831       -2     

Flag	Coverage Δ
unittests	68.04% <58.62%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/runtimeproxy/server/docker/handler.go	37.23% <0.00%> (-0.80%)	⬇️
pkg/runtimeproxy/server/docker/server.go	65.89% <25.00%> (-1.57%)	⬇️
pkg/runtimeproxy/resexecutor/cri/container.go	60.46% <60.00%> (ø)
pkg/runtimeproxy/server/docker/utils.go	87.11% <100.00%> (+1.11%)	⬆️
pkg/koordlet/runtimehooks/reconciler/reconciler.go	78.94% <0.00%> (-2.11%)	⬇️
pkg/util/httputil/reverseproxy.go	84.84% <0.00%> (-0.27%)	⬇️

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[cheimu]

/lgtm

[cheimu]

/lgtm

[hormes]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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