Fix: fixed required items for a Terraform ComponentDefinition

[zzxwill]

If a Terraform variable is required, the item in OpenAPI schema
is required.

Signed-off-by: Zheng Xi Zhou zzxwill@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

Merging #3257 (87a6e44) into master (2fd8b7b) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3257      +/-   ##
==========================================
+ Coverage   59.67%   59.74%   +0.06%     
==========================================
  Files         260      260              
  Lines       25526    25527       +1     
==========================================
+ Hits        15233    15250      +17     
+ Misses       8361     8350      -11     
+ Partials     1932     1927       -5     

Flag	Coverage Δ
apiserver-unittests	28.00% <0.00%> (-0.14%)	⬇️
core-unittests	49.50% <100.00%> (+0.10%)	⬆️
e2e-multicluster-test	26.05% <0.00%> (+0.06%)	⬆️
e2e-rollout-tests	29.26% <0.00%> (-0.01%)	⬇️
e2etests	31.40% <0.00%> (-0.14%)	⬇️

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

Impacted Files	Coverage Δ
pkg/controller/utils/capability.go	79.80% <100.00%> (+0.04%)	⬆️
...ponentdefinition/componentdefinition_controller.go	80.00% <0.00%> (-5.56%)	⬇️
...es/policydefinition/policydefinition_controller.go	66.66% <0.00%> (ø)
...ntroller/common/rollout/rollout_plan_controller.go	62.05% <0.00%> (+1.53%)	⬆️
...dev/v1alpha2/application/application_controller.go	85.66% <0.00%> (+1.86%)	⬆️
...tepdefinition/workflowstepdefinition_controller.go	69.14% <0.00%> (+5.31%)	⬆️
...aits/traitdefinition/traitdefinition_controller.go	72.63% <0.00%> (+7.36%)	⬆️

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[github-actions]

Successfully created backport PR #3258 for release-1.2.