/api/badge returns http 400 bad request when app name contains dots

[SamuraiPrinciple]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

/api/badge?name=app.domain.com no longer renders a bage and returns HTTP 400 bad request

To Reproduce

• Create an ArgoCD app and name it so that it has a dot in its name (we use domain names for our ArgoCD apps, so something like app.domain.com for example)
• Try and render the app status badge by requesting /api/badge/name=app.domain.com

This is caused by this commit: 543fc25 because validation.NameIsDNSLabel now fails due to application name containing dots.

Expected behavior

A status badge to be rendered.

Screenshots

Version

argocd: v2.8.4+c279299
  BuildDate: 2023-09-13T19:12:09Z
  GitCommit: c27929928104dc37b937764baf65f38b78930e59
  GitTreeState: clean
  GoVersion: go1.20.6
  Compiler: gc
  Platform: linux/amd64

[SamuraiPrinciple]

Closing as it's a duplicate - #15507