Feat: add trait service-account

[yangsoon]

Signed-off-by: yangsoon songyang.song@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

[codecov]

Codecov Report

Merging #2878 (43c28e3) into master (589480a) will increase coverage by 2.85%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2878      +/-   ##
==========================================
+ Coverage   56.94%   59.79%   +2.85%     
==========================================
  Files         226      226              
  Lines       23472    23472              
==========================================
+ Hits        13365    14036     +671     
+ Misses       8448     7758     -690     
- Partials     1659     1678      +19     

Flag	Coverage Δ
apiserver-unittests	27.52% <ø> (+0.05%)	⬆️
core-unittests	53.55% <ø> (-0.07%)	⬇️
e2e-multicluster-test	24.65% <ø> (+0.02%)	⬆️
e2e-rollout-tests	31.37% <ø> (-0.13%)	⬇️
e2etests	36.97% <ø> (?)

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

Impacted Files	Coverage Δ
pkg/multicluster/gc.go	64.28% <0.00%> (-16.67%)	⬇️
...aits/traitdefinition/traitdefinition_controller.go	75.78% <0.00%> (-7.37%)	⬇️
pkg/apiserver/rest/webservice/oam_application.go	60.65% <0.00%> (-6.56%)	⬇️
pkg/apiserver/rest/utils/bcode/bcode.go	43.33% <0.00%> (-3.34%)	⬇️
pkg/addon/addon.go	24.60% <0.00%> (-2.10%)	⬇️
pkg/apiserver/rest/usecase/workflow.go	66.43% <0.00%> (+0.70%)	⬆️
pkg/multicluster/cluster_management.go	49.28% <0.00%> (+0.71%)	⬆️
...dev/v1alpha2/applicationconfiguration/component.go	59.05% <0.00%> (+0.78%)	⬆️
pkg/cue/definition/template.go	64.52% <0.00%> (+0.85%)	⬆️
apis/standard.oam.dev/v1alpha1/rollout_state.go	72.53% <0.00%> (+1.03%)	⬆️
... and 44 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 589480a...43c28e3. Read the comment docs.