Summary:
YBA goes into a crash loop on restart if we are unable to create a valid OIDC client when SSO is enabled.
Added try catch block prevent crash loop.

Test Plan:
Manually verified that crash loop is fixed with valid error message.

Reviewers: svarshney

Reviewed By: svarshney

Differential Revision: https://phorge.dev.yugabyte.com/D42586