[RUNNER.SERVER, 3.1.0/1] Fail to add runners (openid connect)

[ChristopherHX]

Steps to Reproduce

• Setup OpenId connect (An internal CI/CD system compatible with Github actions workflow yaml syntax, action yaml syntax and most action plugins go-gitea/gitea#13539 (comment))
• Try to register a new runner, existing runners are working fine
• It will fail with error Found, due to failed / missing authenication

Workaround

• Temporary comment out one property of OpenId Connect

  "Kestrel": {
    "HttpsFromPem": {
      "Url": "https://*:5001",
      "Certificate": {
        "Path": "./cert.pem",
        "KeyPath": "./key.pem"
      }
    }
  },
  // "ClientId": "ClientId of your Oauth app",
  "ClientSecret": "Client secret of your Oauth app",
  "Authority": "https://gitea:3042",

• Restart Runner.Server
• Register the new Runner
• Revert the change
• Restart Runner.Server
• The new runner can operate normally