[backport v2.10.2] [Enhancement] Virtualization manager shows missing repo if repo URL ends with .git or /

[github-actions]

This is a backport issue for #13199, automatically created via GitHub Actions workflow initiated by @richard-cox

Original issue body:

Setup

• Rancher version: 2.10.1
• Rancher UI Extensions:
• Browser type & version: Chrome

Describe the bug
Virt management page shows repo missing if user manually input harvester-ui-extension URL with .git or /. e.g.

• https://github.com/harvester/harvester-ui-extension.git
• https://github.com/harvester/harvester-ui-extension/

To Reproduce

1. Go to Local -> Apps -> Respositories page, create a harvester repo with above url
2. import a harvester cluster
3. The missing repo message pop up

Result

**Expected
The missing repo message should NOT popup up

Additional context

[yonasberhe23]

Reproduced in 2.10.1 with the provided repro steps

Fix tested in:

• Rancher v2.10-7fafafe2aeaf808afbd8cbd4eec82fa02cbd00f9-head
• Dashboard release-2.10 da5c6f2

Tested:

• https://harvester.github.io/harvester-ui-extension - no branch, this is the GitHub deployment Url
• https://github.com/{forker-repository}/harvester-ui-extension/ - gh-pages
• https://github.com/{forker-repository}/harvester-ui-extension - gh-pages
• https://github.com/harvester/harvester-ui-extension - gh-pages
• https://github.com/harvester/harvester-ui-extension/ - gh-pages
• https://github.com/harvester/harvester-ui-extension.git - gh-pages
• Missing Repo message (Remove the Harvester Repository from 'Repositories' page (but keep the Harvester extension installed) -> Vir management -> Missing repo message displayed)
• Automatic install using Install button (Virt management -> Install)
• Automatic upgrade (Install older version of Harvester extension -> Virt management -> Update button

Created an automated task to add coverage for this test case rancher/qa-tasks#1651