feat: introduce new CRD ComputeNode

[mlycore]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What this PR does / why we need it:

refers to #166

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?

[codecov-commenter]

Codecov Report

Merging #181 (4649953) into main (46be6a7) will decrease coverage by 11.30%.
The diff coverage is 50.62%.

@@             Coverage Diff             @@
##             main     #181       +/-   ##
===========================================
- Coverage   62.36%   51.06%   -11.31%     
===========================================
  Files           2        7        +5     
  Lines         279      752      +473     
===========================================
+ Hits          174      384      +210     
- Misses        103      352      +249     
- Partials        2       16       +14     

Impacted Files	Coverage Δ
shardingsphere-operator/pkg/reconcile/configmap.go	0.00% <0.00%> (ø)
...hardingsphere-operator/pkg/reconcile/deployment.go	0.00% <0.00%> (ø)
shardingsphere-operator/pkg/reconcile/resource.go	25.00% <0.00%> (-35.08%)	⬇️
shardingsphere-operator/pkg/reconcile/hpa.go	38.23% <38.23%> (ø)
shardingsphere-operator/pkg/reconcile/service.go	43.95% <43.95%> (ø)
...gsphere-operator/pkg/reconcile/deployment_proxy.go	84.61% <84.61%> (ø)

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