kk增加自定义harbor版本

[gjing1st]

● kk特性：kk不支持自定义harbor版本，manifest中定义的harbor版本无效，每个kk版本使用代码中的默认harbor版本。 ● 导致的结果：老版本kk安装2.5.3，在漏洞扫描时出现Harbor 访问控制错误漏洞和弱口令漏洞。新版本kk安装2.10.1版本，该版本不再支持插件形式安装Helm Charts。如果自己项目使用了helm部署，需要使用Harbor中的Helm Charts，而2.10.1将无法使用，只能自己手动修复漏洞或者更改版本。 由于我司业务不同，需要频繁离线部署KubeSphere，每次部署KubeSphere时也需要部署Harbor，每次手动更改harbor，太过麻烦。于是修改KubeKey，使kk安装2.7.4(2.8版本后不再支持helm)版本Harbor。

[kubesphere-prow[bot]]

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[kubesphere-prow[bot]]

Welcome @gjing1st! It looks like this is your first PR to kubesphere/kubekey 🎉

[sonarqubecloud[bot]]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[redscholar]

新版kk （feature-gitops分支）可以解决你的问题