feat(ui) Update Apollo cache to work with union types

[chriscollins3456]

Dynamically generate possible types that we pass into our Apollo cache so we can cache union types properly. Previously, Apollo cache simply wouldn't cache anything that was based on a union field, making it very difficult to use.

Here are some docs on the new library added that allows us to get these union types using our existing apollo auto-gen tool: https://the-guild.dev/graphql/codegen/plugins/other/fragment-matcher

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub