【Documentation】Add ks-high-availability

[zhuxiujuan28]

需求：https://github.com/kubesphere/project/issues/6141

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[ks-ci-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: zhuxiujuan28
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[zhuxiujuan28]

请 review 中文文档: https://deploy-preview-3266--kubesphere-website.netlify.app/zh/docs/v4.1/03-installation-and-upgrade/01-preparations/02-configure-high-availability/03-configure-ks-high-availability/
@wansir
cc @smartcat999

中文文档确认后，再提交英文文档

[zhuxiujuan28]

/assign @wansir

[zhuxiujuan28]

中英文文档都修改完毕，请 merge @wansir

[wansir]

/lgtm
/approve