feat: script to disable bbr (backport #4047)

[mergify]

Overview

adds a script to disable bbr as a convenience for anyone that needs to test w/ and w/o bbr

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This is an automatic backport of pull request #4047 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of e90d616 has failed:

On branch mergify/bp/v2.x/pr-4047
Your branch is up to date with 'origin/v2.x'.

You are currently cherry-picking commit e90d616f.
  (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:   go.mod
	modified:   go.sum

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   Makefile

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