support for custom ca

[STEPHANE HENRY]

Hi,

I have problem during runner registration:

1.7183737236047769e+09 ERROR controller.runner Reconciler error {"reconciler group": "gitlab.k8s.alekc.dev", "reconciler kind": "Runner", "name": "runner-cara4", "namespace": "cara4", "error": "Post "https://XXXXXXXXXXX.com/api/v4/runners\": x509: certificate signed by unknown authority"}

I was wondering if the CA is supported by this operator like the official gitlab-runner operator:

apiVersion: apps.gitlab.com/v1beta2
kind: Runner
metadata:
name: gitlab-runner
spec:
gitlabUrl: 'https://XXXXXXXXXX.com'
buildImage: alpine
imagePullPolicy: Always
token: gitlab-runner-secret
ca: godaddy-ca
config: custom-config-toml
env: "LOG_LEVEL=debug"
tags: gitlabtest

thanks