Unify fleet and stand-alone suites (backport #1112)

[mergify]

This is an automatic backport of pull request #1112 done by Mergify.
Cherry-pick of 77a2c55 has failed:

On branch mergify/bp/7.13.x/pr-1112
Your branch is up to date with 'origin/7.13.x'.

You are currently cherry-picking commit 77a2c554.
  (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:   e2e/_suites/fleet/ingest_manager_test.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   e2e/_suites/fleet/features/apm_integration.feature
	both modified:   e2e/_suites/fleet/fleet.go
	both modified:   e2e/_suites/fleet/stand-alone.go
	both modified:   e2e/_suites/fleet/world.go

To fix up this pull request, you can check it out locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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