[8.9](backport #2941) Add Windows support to integration testing runner

[mergify]

This is an automatic backport of pull request #2941 done by Mergify.
Cherry-pick of 35dbbde has failed:

On branch mergify/bp/8.9/pr-2941
Your branch is up to date with 'origin/8.9'.

You are currently cherry-picking commit 35dbbdea9b.
  (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:   Makefile
	modified:   internal/pkg/agent/cmd/watch.go
	deleted:    make.bat
	modified:   pkg/testing/fixture.go
	modified:   pkg/testing/ogc/provisioner.go
	modified:   pkg/testing/ogc/supported.go
	modified:   pkg/testing/runner/debian.go
	modified:   pkg/testing/runner/runner.go
	modified:   pkg/testing/runner/ssh.go
	modified:   pkg/testing/runner/supported.go
	new file:   pkg/testing/runner/windows.go
	modified:   pkg/testing/tools/cmd.go
	modified:   testing/integration/install_test.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   .buildkite/scripts/steps/integration_tests.sh
	both modified:   pkg/testing/fixture_install.go
	both modified:   pkg/testing/tools/tools.go
	both modified:   testing/integration/endpoint_security_test.go
	both modified:   testing/integration/enroll_test.go
	both modified:   testing/integration/fqdn_test.go
	deleted by us:   testing/integration/upgrade_rollback_test.go

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

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[elasticmachine]

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• Start Time: 2023-10-02T22:33:11.608+0000

• Duration: 5 min 24 sec

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• Description: make check-ci

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[blakerouse]

Forgot to remove label.