[Moving] Move APM and APM_Data_Access folders into /x-pack/observability_solution/

[CoenWarmer]

Summary

This PR is part of the initiative to consolidate Observability plugins into x-pack/plugins/observability_solution.

This was discussed and agreed upon with the Observability org in the Observability Office Hours meeting at the end of 2023.

Related PRs:

• Move APM <-- you are here
• Move Data Quality
• Move Exploratory View
• Move Infra
• Move Logs Explorer
• Move Logs Shared
• Move Observability AI Assistant
• Move Observability App
• Move Observability Onboarding
• Move Observability Shared
• Move Profiling
• Move Synthetics
• Move Uptime
• Move UX

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[yngrdyn]

Dataset quality changes LGTM

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💛 Build succeeded, but was flaky

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• Commit: 0a9f312
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Failed CI Steps

• Detection Engine - Security Solution Cypress Tests #7

Test Failures

• [job] [logs] Detection Engine - Security Solution Cypress Tests #7 / Timeline scope Modified badge Selecting new data view does not add a modified badge Selecting new data view does not add a modified badge

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
apm	3.2MB	3.2MB	+7.0B
datasetQuality	141.9KB	142.2KB	+294.0B
uptime	458.6KB	459.0KB	+371.0B
total			+672.0B

History

• 💔 Build #195224 failed 1fdf207
• 💔 Build #195214 failed 7ea7963
• 💔 Build #195201 failed 62b3b2c
• 💔 Build #195191 failed 28ba628
• 💔 Build #195165 failed e545f86

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