[CPS] Design update

[mbondyra]

Summary

Fixes #245195

Uses eui crossProjectSearch Icon instead of a custom one.

Exposes project_routing query param in endpoint /internal/cps/projects_tags - not used yet though, but we'll need it soon.

A small design change to show a project picker without a notification - like badge:

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
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines
• Review the backport guidelines and apply applicable backport:* labels.

Identify risks

Does this PR introduce any risks? For example, consider risks like hard to test bugs, performance regression, potential of data loss.

Describe the risk, its severity, and mitigation for each identified risk. Invite stakeholders and evaluate how to proceed before merging.

• See some risk examples
• ...

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 63a8e4f

Failed CI Steps

• FTR Configs #14
• FTR Configs #68
• FTR Configs #97
• Scout: [ platform / streams_app ] plugin

Test Failures

• [job] [logs] FTR Configs #97 / Reporting Generate CSV from SearchSource unquoted values Exports CSV with almost all fields when using fieldsFromSource

Metrics [docs]

Async chunks

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

id	before	after	diff
cps	12.0KB	11.2KB	-795.0B
presentationPanel	45.4KB	45.4KB	+12.0B
total			-783.0B

History

• 💛 Build #375850 was flaky b550fde

[olapawlus]

Unblocking CI :)

[stratoula]

Thanks Marta, looks great. Code review only