Deprecate the legacy OCI bundles implementation

[afrittoli]

The OCI bundles feature is implemented today through remote resolution, which is in beta.
The feature flag for OCI bundles is still in alpha. It should be deprecated and eventually removed.

The OCI bundles features will mature as part of the overall remote resolution work.

Related work: #5514

[afrittoli]

/cc @vdemeester

[vdemeester]

/assign