Configure Bundle CA Cert if provided

[dsavineau]

This adds a new parameter to the pulp CRD for specifying a secret resource that contains a bundle CA certificate value (under the bundle-ca.crt key.
The custom bundle CA certificate will be added to the trusted CA certificate database.

[rooftopcellist]

@dsavineau we need to add the following to roles/common/defaults/main.yml

bundle_cacert_secret: ''

Otherwise, we will see this error when the user does not specify a CA bundle secret.

'bundle_cacert_secret' is undefined

[rooftopcellist]

CI is failing because it is not fully set up yet in this new repo.

I tested this PR out and it works in both scenarios:

• With a bundle_cacert_secret configured
• With a vanilla Galaxy CR

CR tested:

---
apiVersion: pulp.pulpproject.org/v1beta1
kind: Pulp
metadata:
  name: galaxy
  namespace: galaxy
spec:
  # Test CA Bundle
  bundle_cacert_secret: my-custom-certs

  ingress_type: Route
  deployment_type: galaxy
  image: quay.io/pulp/galaxy-minimal
  image_version: 4.7.1
  image_web: quay.io/pulp/galaxy-web
  image_web_version: 4.7.1