fix(filters) Fix autocomplete for platforms and improve advanced search builder

[chriscollins3456]

Our advanced search builder which is used when clicking "+add filter" in the search experience and when building view filters was broken in one way and not optimal in another.

1. Platforms were not able to be searched for using auto-complete. So platform filters in views were completely broken. I added autocomplete functionality for it on the backend so things are good now.
2. We didn't do an initial search for dropdowns that should show some initial data, so it required that you type something in the search bar before you see any results. Now i add that initial search to pre-populate data.

screenshots of it working now:

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]

Codecov Report

Attention: Patch coverage is 4.16667% with 23 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...web-react/src/app/searchV2/filters/value/utils.tsx	4.76%	20 Missing ⚠️
...src/app/searchV2/filters/value/EntityValueMenu.tsx	0.00%	3 Missing ⚠️

❌ Your patch check has failed because the patch coverage (4.16%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Files with missing lines	Coverage Δ
...src/app/searchV2/filters/value/EntityValueMenu.tsx	22.35% <0.00%> (ø)
...web-react/src/app/searchV2/filters/value/utils.tsx	31.90% <4.76%> (-3.77%)	⬇️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 66bce0d...a6b7220. Read the comment docs.