[Search Connectors][Serverless] Add Search Connectors UI to the Stack Management data Section

[YulNaumenko]

!!MAJORITY OF THE CHANGED FILES ARE MOVED OR COPIED!!

Vision

According to the product vision we will build a new simple UI/UX in the future https://github.com/elastic/security-team/issues/11790

This PR is a first iteration on enabling Content Connectors Management UI in Serverless Kibana Stack Management.
Elastic Managed content connectors will be available only for Security and Observability projects.

Current PR scope

1. Used initial search_connectors plugin and renamed it to content_connectors + moved from x-pack/solutions/search to x-pack/platform/plugins/shared
2. Copy relevant connectors UI and routes from enterprise_search plugin.
3. Introduce the new Stack Management card/navigation option under the Data section.
4. Enabled this plugin only in Serverless for Security and Observability projects.
5. For making PR smaller Pipelines tab was not moved. And according to Search team vision this functionality should be dropped anyway soon.
6. Extended fleet package logic to include elastic_connectors for security and o11y serverless projects
7. Added back search:agentless-connectors-manager task

In Stack Management navigation:

Stack Management cards:

Create Elastic Managed Connector UI (on Agentless):

Create Self Managed Connector UI:

Next steps

• Remove duplicated code between content_connectors, enterprise_search and serverless_search
• Extract common server libs to the shared package kbn-search-connectors

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: ee1c9bf
• Cloud Deployment
• Kibana Serverless Image: docker.elastic.co/kibana-ci/kibana-serverless:pr-213509-ee1c9bf762d4
• Security Deployment

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
contentConnectors	-	404	+404
management	86	87	+1
searchConnectors	77	-	-77
searchIndices	335	333	-2
securitySolutionServerless	154	155	+1
serverless	43	44	+1
serverlessObservability	10	11	+1
serverlessSearch	411	412	+1
total			+330

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/search-connectors	3958	3977	+19
@kbn/search-shared-ui	10	8	-2
contentConnectors	-	12	+12
searchConnectors	7	-	-7
total			+22

Async chunks

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

id	before	after	diff
contentConnectors	-	471.5KB	⚠️ +471.5KB
enterpriseSearch	1.3MB	1.3MB	+116.0B
management	31.6KB	32.8KB	+1.2KB
searchIndices	180.4KB	180.6KB	+106.0B
searchPlayground	207.4KB	207.5KB	+158.0B
serverlessSearch	343.5KB	347.6KB	+4.1KB
total			+477.2KB

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
@kbn/search-connectors	0	1	+1

Page load bundle

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

id	before	after	diff
contentConnectors	-	29.2KB	+29.2KB
enterpriseSearch	38.8KB	38.8KB	+1.0B
searchConnectors	60.3KB	-	-60.3KB
securitySolutionServerless	48.3KB	48.6KB	+261.0B
serverless	9.6KB	9.8KB	+195.0B
serverlessObservability	13.4KB	13.6KB	+260.0B
serverlessSearch	25.8KB	26.0KB	+195.0B
total			-30.2KB

Unknown metric groups

API count

id	before	after	diff
@kbn/search-connectors	3958	3977	+19
@kbn/search-shared-ui	10	8	-2
contentConnectors	-	12	+12
searchConnectors	7	-	-7
total			+22

async chunk count

id	before	after	diff
contentConnectors	-	3	+3

ESLint disabled in files

id	before	after	diff
searchConnectors	2	-	-2

ESLint disabled line counts

id	before	after	diff
contentConnectors	-	23	+23

miscellaneous assets size

id	before	after	diff
contentConnectors	-	240.4KB	⚠️ +240.4KB

Total ESLint disabled count

id	before	after	diff
contentConnectors	-	23	+23
searchConnectors	2	-	-2
total			+21

History

• 💔 Build #294356 failed 6da9294
• 💚 Build #294348 succeeded c689ae5
• 💔 Build #294281 failed 62c36fa
• 💔 Build #294245 failed 020e820

cc @YulNaumenko