[APM] Consistent "no data" screen with other Observability solutions

[cauemarcondes]

closes #108980

Adds logic to dynamically show the no data screen on APM.

• A new API was created GET /api/apm/has_data which looks if there is any data available in the APM indices.
• Removed the hasHistoricalData from the services API.
• Removed the old empty message that was located inside the service inventory page.
• Added API tests

When there is no data:

When there is data:

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 5d7bbee
• Storybooks Preview
• Documentation Changes

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
apm	1625	1626	+1

Async chunks

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

id	before	after	diff
apm	4.4MB	4.4MB	-571.0B
observability	555.5KB	555.6KB	+58.0B
total			-513.0B

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
observability	9	10	+1

History

• 💔 Build #152039 failed ee60723
• 💔 Build #151991 failed d5fac6c
• 💔 Build #151980 failed 8573779

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[kibanamachine]

💚 Backport successful

Status	Branch	Result
✅	7.x

This backport PR will be merged automatically after passing CI.