Fix: make the impersonation feature work

[barnettZQG]

Signed-off-by: barnettZQG barnett.zqg@gmail.com

Description of your changes

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Base: 61.27% // Head: 61.12% // Decreases project coverage by -0.14% ⚠️

Coverage data is based on head (08a3a2d) compared to base (5f71d05).
Patch coverage: 48.14% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5261      +/-   ##
==========================================
- Coverage   61.27%   61.12%   -0.15%     
==========================================
  Files         307      307              
  Lines       46355    46350       -5     
==========================================
- Hits        28404    28332      -72     
- Misses      15027    15099      +72     
+ Partials     2924     2919       -5     

Flag	Coverage Δ
apiserver-e2etests	35.50% <48.14%> (-0.08%)	⬇️
apiserver-unittests	36.30% <20.83%> (-0.02%)	⬇️
core-unittests	55.11% <100.00%> (-0.10%)	⬇️
e2e-multicluster-test	18.99% <3.84%> (-0.12%)	⬇️
e2e-rollout-tests	20.66% <8.33%> (+0.02%)	⬆️
e2etests	26.19% <8.33%> (+0.10%)	⬆️

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

Impacted Files	Coverage Δ
pkg/apiserver/domain/repository/env.go	58.49% <ø> (ø)
pkg/apiserver/interfaces/api/env.go	52.67% <0.00%> (ø)
pkg/apiserver/domain/service/target.go	57.86% <20.00%> (-0.09%)	⬇️
pkg/apiserver/utils/auth.go	63.63% <45.45%> (+4.37%)	⬆️
pkg/apiserver/domain/service/project.go	59.11% <50.00%> (+0.09%)	⬆️
pkg/apiserver/domain/service/env.go	65.36% <60.00%> (+0.27%)	⬆️
pkg/addon/versioned_registry.go	78.88% <100.00%> (ø)
pkg/features/apiserver_features.go	100.00% <100.00%> (ø)
pkg/addon/registry.go	38.65% <0.00%> (-12.61%)	⬇️
...es/policydefinition/policydefinition_controller.go	73.17% <0.00%> (-7.32%)	⬇️
... and 15 more

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