Feat: upgrade cluster-gateway to support client-identity-exchange config

[Somefive]

Signed-off-by: Somefive yd219913@alibaba-inc.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

[barnettZQG]

Great!

[codecov]

Codecov Report

Base: 61.16% // Head: 61.11% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (a8ba40d) compared to base (3a917cb).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5284      +/-   ##
==========================================
- Coverage   61.16%   61.11%   -0.05%     
==========================================
  Files         308      308              
  Lines       46562    46562              
==========================================
- Hits        28478    28457      -21     
- Misses      15138    15148      +10     
- Partials     2946     2957      +11     

Flag	Coverage Δ
apiserver-e2etests	32.49% <ø> (+0.11%)	⬆️
apiserver-unittests	36.24% <ø> (+0.03%)	⬆️
core-unittests	55.17% <ø> (+0.03%)	⬆️
e2e-multicluster-test	19.00% <ø> (-0.14%)	⬇️
e2e-rollout-tests	20.72% <ø> (-0.01%)	⬇️
e2etests	26.36% <ø> (-0.13%)	⬇️

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

Impacted Files	Coverage Δ
...aits/traitdefinition/traitdefinition_controller.go	69.41% <0.00%> (-7.06%)	⬇️
...troller/core.oam.dev/v1alpha2/application/apply.go	86.07% <0.00%> (-2.85%)	⬇️
pkg/multicluster/cluster_management.go	37.23% <0.00%> (-2.66%)	⬇️
pkg/oam/util/helper.go	61.91% <0.00%> (-2.09%)	⬇️
pkg/controller/utils/capability.go	78.93% <0.00%> (-1.71%)	⬇️
pkg/cue/definition/template.go	66.46% <0.00%> (-1.50%)	⬇️
...dev/v1alpha2/application/application_controller.go	85.11% <0.00%> (-1.17%)	⬇️
.../core/scopes/healthscope/healthscope_controller.go	71.71% <0.00%> (-1.10%)	⬇️
...ller/core.oam.dev/v1alpha2/application/revision.go	70.83% <0.00%> (-0.91%)	⬇️
pkg/multicluster/virtual_cluster.go	76.19% <0.00%> (-0.74%)	⬇️
... and 11 more

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