Remove sugar controller installation and uninstallation steps

[prushh]

Fixes #5826

Proposed Changes

• Remove the separate sugar controller installation/uninstallation steps from
  • Installing Knative Eventing using YAML files / Uninstalling Knative
• Remove the eventing-sugar-controller.yaml file from table
  • Knative Eventing installation files

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[ReToCode]

/assign @pierDipi

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew, pierDipi, prushh

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/knative/docs/blob/main/OWNERS)~~ [pierDipi] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[matzew]

/cherry-pick release-1.13

[knative-prow-robot]

@matzew: new pull request created: #5843

In response to [this](https://github.com/knative/docs/pull/5834#issuecomment-1916696521): >/cherry-pick release-1.13 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[matzew]

Thanks for the PR, @prushh