Adopt Kubernetes TLS secrets API to check for TLS data in the Secret
referred to by `.spec.certSecretRef`, i.e. check for keys `tls.crt` and
`tls.key` for the certificate and private key. Use `ca.crt` for the CA
certificate.
Signed-off-by: Sanskar Jaiswal <jaiswalsanskar078@gmail.com>
Sanskar Jaiswal