feat(schema): support rendering schemas with . in field names

[gabe-lyons]

We used to tokenize field names by . when rendering. This updates the logic to instead truncate based on the parent's path.

For example, here is a looker dataset rendering properly:

and a nested dataset:

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

[github-actions]

Unit Test Results (build & test)

381 tests  ±0   381 ✔️ ±0   3m 23s ⏱️ -1s
  89 suites ±0       0 💤 ±0 
  89 files   ±0       0 ❌ ±0 

Results for commit c4f7bd5. ± Comparison against base commit e6b66d8c.