Added a Brave Search connector

[seanstory]

Summary

Adds a connector for Brave Search to the new "v2" framework.

This is an API we've found useful for doing web search in workflows and with Agent Builder.

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

Release Notes

Introduces a connector for web search via Brave Search

[github-actions]

🔍 Preview links for changed docs

• docs/reference/connectors-kibana/brave-search-action-type.md

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: f3dba98

Failed CI Steps

• FTR Configs #19
• FTR Configs #19

Test Failures

• [job] [logs] FTR Configs #19 / EPM Endpoints Rollback APIs Package rollback input package should fail when at least one package policy does not have a previous revision
• [job] [logs] FTR Configs #19 / EPM Endpoints Rollback APIs Package rollback input package should fail when at least one package policy does not have a previous revision

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
stackConnectors	503	506	+3
workflowsManagement	1969	1970	+1
total			+4

Async chunks

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

id	before	after	diff
stackConnectors	827.3KB	834.0KB	+6.7KB
workflowsManagement	4.2MB	4.2MB	+1.7KB
total			+8.4KB

Page load bundle

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

id	before	after	diff
stackConnectors	72.8KB	72.8KB	+67.0B

Unknown metric groups

async chunk count

id	before	after	diff
stackConnectors	111	112	+1

History

• 💔 Build #369291 failed 9b7c287