[metaBuilder] Update oemetadata integration and metadata version

Description of the issue

The OEMetaBuilder is still using oemetadata version 1.5.1. We already have the oemetadata pypi package installed and can use it.
We can use the json fields from the package to facilitate metadata integration and update the MetaBuilder schema. Since the schema is used to generate the MetaBuilder form and it needs some customization, we need to implement functionality to extend the imported oemetadata schema.

Ideas of solution

• Remove oemetadata template files form dataedit/static folders
• Import metadata template and schmea form oemetadata pypi package
• Implement functionality to customize the json schema to be able to use it with the metaBuilder js backend (json-form generator uses the schema)
• Update metadata widget implementation in dataedit/static/dataedit/metadata.js and backend in dataedit/metadata

Workflow checklist

• I am aware of the workflow in CONTRIBUTING.md