[8.13](backport #3849) [SLO] Add manage_ingest_pipelines to list of required privileges

[mergify]

Closes #3848.

@kdelemme A couple questions:

• Are there any other versions we need to backport this to?
• Does this requirement only I apply to the SLO All role described in the docs? I'm assuming it does not apply to the SLO Read role.

  ---

  This is an automatic backport of pull request [SLO] Add manage_ingest_pipelines to list of required privileges #3849 done by Mergify.

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