runtimeproxy: fix env lost

[lucming]

Ⅰ. Describe what this PR does

fix bug: env lost when container's env contains = in its value.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

kubectl apply -f nginx.yaml, like this

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
    - name: nginx
      image: nginx
      env:
        - name: JAVA_OPT_EXT
          value: '-Ddubbo.consumer.check=false -Dmtd.account.cache.switch=off'

However, this env is not written in the container

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

Base: 66.96% // Head: 66.99% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (d07083b) compared to base (388f7ad).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #957      +/-   ##
==========================================
+ Coverage   66.96%   66.99%   +0.03%     
==========================================
  Files         243      243              
  Lines       28240    28240              
==========================================
+ Hits        18910    18920      +10     
+ Misses       8035     8026       -9     
+ Partials     1295     1294       -1     

Flag	Coverage Δ
unittests	66.99% <100.00%> (+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/utils.go	87.11% <100.00%> (ø)
pkg/scheduler/plugins/coscheduling/core/gang.go	76.07% <0.00%> (+0.92%)	⬆️
pkg/koordlet/runtimehooks/reconciler/reconciler.go	65.88% <0.00%> (+4.11%)	⬆️

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[honpey]

/lgtm

[koordinator-bot]

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