[Automatic Import V2] Create Integration routes

[bhapas]

Summary

This PR adds integration routes.

[ UI Texts in PR description subject to change ]

PUT /integrations - Creates new integration
UI :

• User clicks on Create New Integration button and fills the form for integration and data stream and clicks Analyze Logs - Creates an integration SO and a data stream SO[ BG task starts for creating the DS]
• User clicks on Create New Integration button and fills the form for integration and clicks on Save - Creates just the integration SO.

GET /integrations - Lists all integrations

UI:

• User clicks on Manage My Integrations and it should list all the integrations created using Auto Import.

GET /integrations/{integration_id} - Fetches particular integration

UI:

• User clicks on a particular integration in the integrations table. It should fetch the integration information along with all underlying data streams' information.

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 2c01564

Metrics [docs]

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
automaticImportVTwo	39	42	+3

Unknown metric groups

API count

id	before	after	diff
automaticImportVTwo	43	50	+7

ESLint disabled line counts

id	before	after	diff
automaticImportVTwo	2	3	+1

Total ESLint disabled count

id	before	after	diff
automaticImportVTwo	2	3	+1

History

• 💔 Build #368663 failed 081e462
• 💔 Build #368529 failed 2f7f0d1
• 💔 Build #368490 failed ddf91fc
• 💔 Build #367551 failed 641e906
• 💔 Build #367539 failed e3c9938

cc @bhapas