feat: random documents from jsonschema

[fominok]

Issue being fixed or feature implemented

Adds a method under a feature flag for DocumentType to generate random documents using json-schema-faker-rs solution

What was done?

Since jsonschema taken from DocumentType is not fully defined at one place as a self-contained schema, this PR wraps a json-schema-faker-rs part into manual tweaks to be able to go from json-schema-faker-rs output to an actual Document.

How Has This Been Tested?

There is a test.

Breaking Changes

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added or updated relevant unit/integration/functional/e2e tests
• [x] I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• [x] I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• [ ] I have assigned this pull request to a milestone