When using the catalog index, the install-dynamic-plugins.py script attempts to parse and resolve all OCI references before applying overrides from Helm values/dynamic-plugins config.

Current behavior:

• Catalog index is extracted and replaces dynamic-plugins.default.yaml
• Script iterates through plugins and tries to resolve each OCI reference (auto-detecting plugin path from io.backstage.dynamic-packages annotation)
• If annotation is missing, script crashes with InstallException: No plugins found in OCI image
• Overrides from Helm values are never checked

Expected behavior:
The script should check if a plugin has disabled: true in the Helm values/dynamic-plugins config before attempting to resolve the OCI reference. This would allow users to disable broken/problematic plugins without the script crashing.

Steps to reproduce:

Have a catalog index with an OCI plugin reference missing the io.backstage.dynamic-packages annotation

Add disabled: true override for that plugin in Helm values

Deploy - script crashes before applying the override

Related: RHDHBUGS-2530