[Infra UI] Rename Disk Usage charts

[jennypavlova]

Closes #165812

Summary

This PR renames:

• Disk Space / Disk Space Usage to Disk Usage
• Disk Space by Mount Point to Disk Usage by Mount Point
• Disk Space Usage (avg.) to Disk Usage (avg.)

in hosts view table and charts (as well as in the asset details view and host flyout).

Testing

Open hosts view and check the issue description to see which titles have changed. Example testing steps:

diskUsageRename.mov

[apmmachine]

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• /oblt-deploy-serverless : Deploy a serverless Kibana instance using the Observability test environments.
• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

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

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 80eaf9e

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
infra	2.0MB	2.0MB	-83.0B

History

• 💔 Build #157394 failed e5144ca
• 💔 Build #157337 failed 8591a32
• 💔 Build #157336 failed 49a3898
• 💔 Build #157286 failed 256860c
• 💔 Build #157201 failed a4136be

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

cc @jennypavlova

[mykolaharmash]

Nice 🚀