feat(graphql) Format all graphql schema files to be consistent

[chriscollins3456]

In order to make all of our graphql files consistent, this PR reformats them using prettier. For the real diff, which the only diff here is a couple of changes to documentation, review this PR with whitespace turned off.

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

[codecov]

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All modified and coverable lines are covered by tests ✅

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[shirshanka]

Could you add a gradle task to run the prettier command? That way anyone else could fix up this PR as it inevitably starts having merge conflicts.