Ingresses use self-signed wildcard certificate rather than CertManager certs

Current state

The ingresses from the Helm chart specify the RELEASE_NAME-wildcard-tls secret rather than using certificates generated by CertManager.

Desired state

If desired, a user can use CertManager to generate certificates for the ingresses. Self-signed certificates should still be supported for development/testing.

Notes

These two lines (1,2) are what currently tells the ingresses to use the self-signed wildcard secret.