[Moving] Move Exploratory View 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 PR is strictly a move and an update in references.

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
• Move Data Quality
• Move Exploratory View <-- you are here
• 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

[apmmachine]

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

LGTM

[kibana-ci]

💛 Build succeeded, but was flaky

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• Commit: 417aab2
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Failed CI Steps

• FTR Configs #81

Test Failures

• [job] [logs] FTR Configs #81 / Rules Management - Prebuilt Rules - Bundled Prebuilt Rules Package @ess @serverless @skipInQA install_bundled_prebuilt_rules should install prebuilt rules from the package that comes bundled with Kibana

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
exploratoryView	180.3KB	180.3KB	+1.0B

Page load bundle

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

id	before	after	diff
exploratoryView	43.7KB	43.7KB	-4.0B

History

• 💔 Build #194804 failed 55233f5
• 💔 Build #194785 failed e2f47f0
• 💔 Build #194691 failed 3fd7b4d
• 💔 Build #194672 failed 366be63d46ade5195e8ef5790b78e2864cfc3345
• 💔 Build #194666 failed 60ee294

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@elasticmachine merge upstream