Feat: make addon init use the latest CUE addon template

[charlie0129]

Signed-off-by: Charlie Chiang charlie_c_0129@outlook.com

Description of your changes

We now support using CUE in addon template #4401 (template.cue instead of template.yaml)

This PR makes vela addon init use this latest feature (generating template.cue).

Generating template.yaml is no longer supported.

This won't cause compatibility issues, since the users that are able to generate template.cue are also using a CLI version that can properly handle template.cue. Those who cannot handle template.cue are using a CLI version that can generate the legacy yaml addon format.

Directory structure:

sample-addon-cue/
├── definitions
│   └── mytrait.cue
├── metadata.yaml
├── parameter.cue
├── README.md
├── resources
│   └── myresource.cue
├── schemas
│   └── myschema.yaml
├── template.cue
└── views
    └── my-view.cue

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. (no permission to add label)

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Merging #4434 (f933043) into master (3e57246) will decrease coverage by 6.72%.
The diff coverage is 82.14%.

@@            Coverage Diff             @@
##           master    #4434      +/-   ##
==========================================
- Coverage   59.47%   52.74%   -6.73%     
==========================================
  Files         343      347       +4     
  Lines       34247    34415     +168     
==========================================
- Hits        20368    18152    -2216     
- Misses      11199    13838    +2639     
+ Partials     2680     2425     -255     

Flag	Coverage Δ
apiserver-e2etests	?
apiserver-unittests	40.18% <ø> (+0.26%)	⬆️
core-unittests	56.47% <82.14%> (+0.02%)	⬆️
e2e-multicluster-test	19.69% <0.00%> (?)
e2e-rollout-tests	22.95% <ø> (+0.07%)	⬆️
e2etests	29.36% <ø> (+0.39%)	⬆️

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

Impacted Files	Coverage Δ
pkg/addon/utils.go	71.57% <77.27%> (-0.59%)	⬇️
pkg/addon/init.go	82.27% <100.00%> (-0.18%)	⬇️
pkg/apiserver/domain/service/service.go	0.00% <0.00%> (-92.31%)	⬇️
...kg/apiserver/interfaces/api/assembler/v1/do2dto.go	0.00% <0.00%> (-90.08%)	⬇️
pkg/apiserver/domain/model/workflow.go	11.76% <0.00%> (-88.24%)	⬇️
pkg/apiserver/domain/model/cluster.go	14.28% <0.00%> (-85.72%)	⬇️
pkg/apiserver/domain/model/env.go	16.66% <0.00%> (-83.34%)	⬇️
pkg/apiserver/interfaces/api/velaql.go	4.16% <0.00%> (-83.34%)	⬇️
pkg/apiserver/event/sync/convert/convert.go	0.00% <0.00%> (-83.22%)	⬇️
pkg/apiserver/domain/model/target.go	20.00% <0.00%> (-80.00%)	⬇️
... and 138 more

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[wonderflow]

please refer to https://github.com/kubevela/kubevela/pull/4443/files

[charlie0129]

I figured out that if I were to Unmarshal to Application, it required all these files, otherwise it won't work. Since it only determines if it is a addon dir, just look for output keyword inside template.cue is enough.
What do you think?

[wonderflow]

need to refactor after the new app render func

[github-actions]

Successfully created backport PR #4456 for release-1.5.