Feat: support outputs objects for policy

[wonderflow]

Signed-off-by: Jianbo Sun jianbo.sjb@alibaba-inc.com

Description of your changes

Fixes #5047

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: 61.08% // Head: 61.01% // Decreases project coverage by -0.06% ⚠️

Coverage data is based on head (f746750) compared to base (e63aa44).
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5183      +/-   ##
==========================================
- Coverage   61.08%   61.01%   -0.07%     
==========================================
  Files         305      305              
  Lines       45337    45356      +19     
==========================================
- Hits        27692    27676      -16     
- Misses      14800    14825      +25     
- Partials     2845     2855      +10     

Flag	Coverage Δ
apiserver-e2etests	35.01% <0.00%> (+0.03%)	⬆️
apiserver-unittests	36.85% <ø> (ø)
core-unittests	55.07% <80.00%> (+0.03%)	⬆️
e2e-multicluster-test	18.96% <0.00%> (-0.01%)	⬇️
e2e-rollout-tests	20.48% <0.00%> (-0.10%)	⬇️
e2etests	25.83% <66.66%> (-0.13%)	⬇️

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

Impacted Files	Coverage Δ
pkg/appfile/appfile.go	74.14% <80.00%> (-0.19%)	⬇️
pkg/apiserver/event/sync/cr2ux.go	44.70% <0.00%> (-5.89%)	⬇️
pkg/cue/definition/template.go	64.55% <0.00%> (-5.19%)	⬇️
...troller/core.oam.dev/v1alpha2/application/apply.go	87.84% <0.00%> (-2.09%)	⬇️
pkg/apiserver/event/sync/store.go	69.95% <0.00%> (-1.80%)	⬇️
...dev/v1alpha2/application/application_controller.go	84.97% <0.00%> (-1.18%)	⬇️
...server/infrastructure/datastore/kubeapi/kubeapi.go	62.60% <0.00%> (-0.84%)	⬇️
pkg/oam/util/helper.go	63.47% <0.00%> (-0.53%)	⬇️
pkg/addon/registry.go	51.26% <0.00%> (ø)
... and 8 more

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