[Bug]: wrong oidc provisioner config prevents startup, can't remove provisioner

[PeterGrace]

Steps to Reproduce

• setup an oidc provisioner with keycloak using legacy url format (https://keycloak-server/auth/realms/realm/...)
• upgrade keycloak to newer version with updated route url (https://keycloak-server/realms/realm/...)
• step-ca fails to start with error parsing https://keycloak-server/auth/realms/gfpd/.well-known/openid-configuration: issuer cannot be empty

Your Environment

• OS - Docker container
• step-ca Version - 0.25.2

Expected Behavior

I'd like to be able to start step-ca so that I can remove or repair the faulty provisioner config

Actual Behavior

step-ca errors on start, no way to change the provisioner config

Additional Context

I attempted to remediate by turning off remoteAdmin which allows step-ca to start, but it also appears to not read the database, so the provisioner list is [] when remoteAdmin is false, leaving me no ability to delete or edit the faulty provisioner.

Contributing

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[maraino]

Fixed by #1765