Use Apify to parse Instagram URLs

[jayjay-w]

Description

We currently use Apify to parse facebook URLs. In this PR, we are adding the functionality to parse Instagram URLs too using Apify.

References: CV2-4289

Implementation Plan

• Update MediaApifyItem to accept instagram URLs as well
• Change the current Instagram parser to call MediaApifyItem
• Update existing tests with expected Apify JSON schema

How has this been tested?

• Ensured that all instagram URLs for posts and profiles can be parsed
• Existing tests are not broken

Checklist

• I have performed a self-review of my own code
• I have added unit and feature tests, if the PR implements a new feature or otherwise would benefit from additional testing
• I have added regression tests, if the PR fixes a bug
• I have added logging, exception reporting, and custom tracing with any additional information required for debugging
• I considered secure coding practices when writing this code. Any security concerns are noted above.
• I have commented my code in hard-to-understand areas, if any
• I have made needed changes to the README
• My changes generate no new warnings
• If I added a third party module, I included a rationale for doing so and followed our current guidelines