[Logs Explorer] Add Discover fallback link

[tonyghiani]

📓 Summary

Closes #165220

This PR introduces a new fallback link from the Log Explorer application to Discover.

To correctly retrieve the details required to correctly navigate to Discover with the used data view and filters, the LogExplorer component accepts now a new state$ behaviour subject as a property that can be used to notify the consumers of any change from the internal state.

discover_fallback.mov

🧪 Test suite

↳ Observability Log Explorer
  ↳ Header menu
    ↳ should inject the app header menu on the top navbar
    ↳ Discover fallback link
      ↳ should render a button link
      ↳ should navigate to discover keeping the current columns/filters/query/time/data view

[apmmachine]

🤖 GitHub comments

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• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
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[elasticmachine]

Pinging @elastic/infra-monitoring-ui (Team:Infra Monitoring UI)

[tonyghiani]

/oblt-deploy-serverless

[Kerry350]

Nice work @tonyghiani 👏

Code looks good, and the link works as expected.

[davismcphee]

Code-only review. Discover type export LGTM. Also had a quick look at the other changes in o11y to make this work including use of the Discover locator, and they also LGTM 👍

[kibana-ci]

💔 Build Failed

• Buildkite Build
• Commit: e5c5819
• Interpreting CI Failures

Failed CI Steps

• Serverless Observability Examples Tests
• Serverless Security Investigations Cypress Tests #2
• Serverless Security Investigations Cypress Tests #3

Test Failures

• [job] [logs] Serverless Security Investigations Cypress Tests #2 / Export timelines Exports a custom timeline template Exports a custom timeline template
• [job] [logs] Serverless Security Investigations Cypress Tests #2 / Row renderers "before all" hook for "Row renderers should be enabled by default" "before all" hook for "Row renderers should be enabled by default"
• [job] [logs] Serverless Observability Examples Tests / serverless examples UI Unified Field List Examples Field stats field distribution "before all" hook for "should return an auto histogram for numbers and top values"

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
observabilityLogExplorer	32	36	+4

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
discover	71	72	+1
logExplorer	3	6	+3
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
logExplorer	220.7KB	220.9KB	+170.0B

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
logExplorer	1	4	+3

Page load bundle

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

id	before	after	diff
logExplorer	5.5KB	6.0KB	+437.0B
observabilityLogExplorer	8.7KB	11.5KB	+2.8KB
total			+3.2KB

Unknown metric groups

API count

id	before	after	diff
discover	98	113	+15
logExplorer	3	6	+3
total			+18

History

• 💔 Build #156676 failed f81a4ed
• 💔 Build #156550 failed 6b4a625
• 💔 Build #156461 failed 2189c4a
• 💔 Build #156325 failed 025c9c9

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