Feat: support getting CLI-created clusters on apiserver

[Somefive]

Description of your changes

This PR extends the Get/List interface for clusters in apiserver. The Get/List interface will search the cluster in control plane and match the data in apiserver datastore, which will allow users to see clusters created by CLI on VelaUX.

When Get request happens, the retrieved cluster from CLI will also be synced to apiserver database.

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.

This PR depends on #3849

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Merging #3866 (e34b86a) into master (a8ad79b) will decrease coverage by 0.04%.
The diff coverage is 78.57%.

❗ Current head e34b86a differs from pull request most recent head f0eb4c6. Consider uploading reports for the commit f0eb4c6 to get more accurate results

@@            Coverage Diff             @@
##           master    #3866      +/-   ##
==========================================
- Coverage   64.14%   64.09%   -0.05%     
==========================================
  Files         312      312              
  Lines       29717    29762      +45     
==========================================
+ Hits        19061    19077      +16     
- Misses       8205     8222      +17     
- Partials     2451     2463      +12     

Flag	Coverage Δ
apiserver-unittests	35.23% <55.71%> (+0.11%)	⬆️
core-unittests	56.70% <78.26%> (-0.05%)	⬇️
e2e-multicluster-test	26.49% <52.17%> (+0.05%)	⬆️
e2e-rollout-tests	23.53% <4.34%> (-0.01%)	⬇️
e2etests	31.11% <4.34%> (-0.19%)	⬇️

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

Impacted Files	Coverage Δ
pkg/multicluster/cluster_management.go	38.93% <33.33%> (ø)
pkg/multicluster/utils.go	66.66% <66.66%> (ø)
pkg/apiserver/rest/usecase/cluster.go	41.20% <74.46%> (+5.22%)	⬆️
pkg/multicluster/virtual_cluster.go	92.68% <100.00%> (-0.82%)	⬇️
pkg/resourcetracker/tree.go	73.68% <100.00%> (ø)
pkg/utils/common/common.go	48.06% <100.00%> (ø)
pkg/multicluster/cluster_metrics_management.go	89.58% <0.00%> (-4.17%)	⬇️
pkg/cue/definition/template.go	63.22% <0.00%> (-2.07%)	⬇️
pkg/resourcekeeper/gc.go	76.30% <0.00%> (-1.90%)	⬇️
...dev/v1alpha2/application/application_controller.go	83.63% <0.00%> (-1.82%)	⬇️
... and 13 more

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[barnettZQG]

Great!