Track removal of deprecated caCert field in favor of caCertRef

[coderabbitai]

Description

The caCert field has been deprecated in favor of caCertRef in the following CRD files:

• bundle/manifests/oadp.openshift.io_dataprotectionapplications.yaml
• bundle/manifests/oadp.openshift.io_dataprotectiontests.yaml
• config/crd/bases/oadp.openshift.io_dataprotectionapplications.yaml
• config/crd/bases/oadp.openshift.io_dataprotectiontests.yaml

This issue tracks the deprecation lifecycle and eventual removal of the caCert field.

Tasks

• Document the deprecation in release notes
• Communicate migration path to users
• Plan removal timeline
• Remove deprecated caCert field in a future release

References

• PR: openshift/velero:oadp-dev rebase + Adapt ToSystemAffinity calls to new Velero API signature #2096
• Comment: openshift/velero:oadp-dev rebase + Adapt ToSystemAffinity calls to new Velero API signature #2096 (comment)

Requested by: @kaovilai