[8.x] Asset criticality advanced setting removed (backport #5991)

[mergify]

Resolves #5975. Removes all references to the asset criticality advanced setting. The setting has been removed and asset criticality is now available by default.

Previews

ESS:

• Asset criticality API
• Configure advanced settings
• Hosts page
• Users page
• Entity risk scoring requirements | Asset criticality
• Entity risk scoring
• Asset criticality

Serverless:

Open the link in this comment, navigate to Security -> View serverless docs, and then to the following pages:

• Manage settings -> Advanced settings
• Explore your data -> Host page
• Explore your data -> Users page
• Advanced Entity Analytics -> Entity risk scoring
• Advanced Entity Analytics -> Entity risk scoring -> Entity risk scoring requirements
• Advanced Entity Analytics -> Entity risk scoring -> Asset criticality

  ---

  This is an automatic backport of pull request Asset criticality advanced setting removed #5991 done by Mergify.

[mergify]

Cherry-pick of 2390859 has failed:

On branch mergify/bp/8.x/pr-5991
Your branch is up to date with 'origin/8.x'.

You are currently cherry-picking commit 2390859c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/advanced-entity-analytics/asset-criticality.asciidoc
	modified:   docs/advanced-entity-analytics/entity-risk-scoring.asciidoc
	modified:   docs/advanced-entity-analytics/ers-req.asciidoc
	modified:   docs/getting-started/advanced-setting.asciidoc
	modified:   docs/getting-started/users-page.asciidoc
	modified:   docs/management/hosts/hosts-overview.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   docs/advanced-entity-analytics/api/asset-criticality-api-overview.asciidoc
	deleted by us:   docs/serverless/advanced-entity-analytics/asset-criticality.mdx
	deleted by us:   docs/serverless/advanced-entity-analytics/entity-risk-scoring.mdx
	deleted by us:   docs/serverless/advanced-entity-analytics/ers-req.mdx
	deleted by us:   docs/serverless/explore/hosts-overview.mdx
	deleted by us:   docs/serverless/explore/users-page.mdx
	deleted by us:   docs/serverless/settings/advanced-settings.mdx

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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