[data views] Remove partial index pattern validation

[mattkime]

Summary

#151788 established that data views would no longer error when they failed to retrieve a field list. This index pattern validation code exists since previously ALL index pattern segments needed to match in order to avoid an error response from field caps, rather than just one. Now we can remove the validation code and simply pass the index pattern to field caps directly.

Checklist

Delete any items that are not applicable to this PR.

• Unit or functional tests were updated or added to match the most common scenarios

[kertal]

@elasticmachine merge upstream

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 7e7c6a4

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
dataViewEditor	39.7KB	39.7KB	+18.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
observability	88.2KB	88.3KB	+70.0B

Unknown metric groups

API count

id	before	after	diff
data	3273	3271	-2
dataViews	1031	1029	-2
total			-4

ESLint disabled line counts

id	before	after	diff
securitySolution	433	436	+3

Total ESLint disabled count

id	before	after	diff
securitySolution	513	516	+3

History

• 💚 Build #115490 succeeded 49ec8c7
• 💛 Build #115344 was flaky b42a522
• 💔 Build #114889 failed 440c665
• 💔 Build #114613 failed 12f144f
• 💔 Build #114556 failed 885f2b1
• 💔 Build #114478 failed c76b367

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[jughosta]

The changes LGTM 👍