Feat: add substitute unstructured object

[FogDong]

Signed-off-by: FogDong dongtianxin.tx@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

Base: 67.78% // Head: 67.79% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (f1f81d9) compared to base (a8d0af5).
Patch coverage: 77.77% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   67.78%   67.79%   +0.01%     
==========================================
  Files          45       45              
  Lines        4045     4065      +20     
==========================================
+ Hits         2742     2756      +14     
- Misses        944      947       +3     
- Partials      359      362       +3     

Flag	Coverage Δ
e2etests	24.20% <0.00%> (-0.14%)	⬇️
unit-test	65.40% <77.77%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
pkg/cue/utils.go	71.87% <42.85%> (-8.13%)	⬇️
pkg/cue/model/value/value.go	79.43% <84.61%> (+0.19%)	⬆️
pkg/cue/model/sets/operation.go	74.38% <100.00%> (ø)
pkg/cue/model/sets/utils.go	72.72% <100.00%> (ø)
pkg/cue/model/sets/walk.go	56.71% <100.00%> (ø)
pkg/providers/kube/handle.go	59.49% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[yangsoon]

Great Job!