Fix harvester support link does not link to support page when embedded Rancher 2.9 (backport #1120)

[mergify]

Summary

Starting from Rancher v2.9 , we have shell/components/templates defines different page layouts for each page in Rancher.

The router defined in shell/config/router/router.js missing name in home block.

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To make harvester support page compatible for v2.8.x, v.2.9.0 and v2.9.1, this PR changes harvester support page layout to default.

The different is default layout has sidebar, while home layout doesn't.

default layout

home layout

Note. this PR needs backport to v1.4 and v1.3.

PR Checklist

• Is this a multi-tenancy feature/bug?
  • Yes, the relevant RBAC changes are at:
• Do we need to backport changes to the old Rancher UI, such as RKE1?
  • Yes, the relevant PR is at:
• Are backend engineers aware of UI changes?
  • Yes, the backend owner is:

Related Issue # harvester/harvester#6442

Screenshot/Video

Test on Rancher 2.9

rancher_2.9.mov

Test on Rancher 2.8

rancher_2.8.mov

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This is an automatic backport of pull request #1120 done by [Mergify](https://mergify.com).

[a110605]

LGTM