feat: add support for more miscellaneous media types

Context

During the course of: &5523 (closed) some imports are failing due to unknown or unusual mediatypes.

pre importing tagged manifests: pre importing manifest: importing layers: creating layer blob: unknown media type: application/vnd.cncf.helm.chart.meta.layer.v1+json
pre importing tagged manifests: pre importing manifest: importing layers: creating layer blob: unknown media type: application/vnd.ansible.collection

Solution

Add support for the media type

• application/vnd.cncf.helm.chart.meta.layer.v1+json
• application/vnd.ansible.collection