Remove bsearch endpoint

[lukasolson]

Summary

Relies on #196962.
Part of #186139.

Removes the api/internal/bsearch endpoint. Updates the SearchInterceptor to no longer use this endpoint.

Checklist

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• Flaky Test Runner was used on any tests changed

[elasticmachine]

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

[pheyos]

test/tsconfig.json and x-pack/test_serverless/tsconfig.json changes LGTM

[mbondyra]

Visualizations changes look good (I didn't test in depth as we're more in charge of aggs in data plugin, while search is more in discovery hands)

[davismcphee]

Code changes look good! I don't see why there'd be any impact from these changes, but I'll do some testing tomorrow to confirm before approving.

[davismcphee]

Noticed no issues testing locally with multiple analytics apps, LGTM 👍 We're getting closer!

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 815fb52

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
data	525	523	-2

Page load bundle

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

id	before	after	diff
data	421.8KB	420.7KB	-1.1KB

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
data	57	56	-1

Total ESLint disabled count

id	before	after	diff
data	59	58	-1

History

• 💚 Build #256261 succeeded b2126e8
• 💚 Build #256175 succeeded 23eb8a9
• 💔 Build #252581 failed 4c26279
• 💔 Build #244482 failed 8ab6a24
• 💔 Build #244481 failed 8ca2078

cc @lukasolson