[7.17](backport #32937) ci: enable windows for testing heartbeat

[mergify]

This is an automatic backport of pull request #32937 done by Mergify.
Cherry-pick of 8552e34 has failed:

On branch mergify/bp/7.17/pr-32937
Your branch is up to date with 'origin/7.17'.

You are currently cherry-picking commit 8552e34a6a.
  (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:   x-pack/heartbeat/monitors/browser/source/inline.go
	modified:   x-pack/heartbeat/monitors/browser/source/inline_test.go
	modified:   x-pack/heartbeat/monitors/browser/source/local.go
	modified:   x-pack/heartbeat/monitors/browser/source/local_test.go
	modified:   x-pack/heartbeat/monitors/browser/source/offline.go
	modified:   x-pack/heartbeat/monitors/browser/source/validatepackage.go
	modified:   x-pack/heartbeat/monitors/browser/source/validatepackage_test.go
	modified:   x-pack/heartbeat/monitors/browser/source/zipurl.go
	modified:   x-pack/heartbeat/monitors/browser/source/zipurl_test.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   x-pack/heartbeat/Jenkinsfile.yml
	deleted by us:   x-pack/heartbeat/monitors/browser/source/project.go
	deleted by us:   x-pack/heartbeat/monitors/browser/source/project_test.go
	both modified:   x-pack/heartbeat/monitors/browser/source/source.go
	deleted by us:   x-pack/heartbeat/scenarios/basics_test.go
	deleted by us:   x-pack/heartbeat/scenarios/scenarios.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]

💔 Build Failed

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Build stats

• Start Time: 2022-09-01T17:23:49.285+0000

• Duration: 8 min 41 sec

Steps errors

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Read yaml from files in the workspace or text.

• Took 0 min 0 sec . View more details here
• Description: x-pack/heartbeat/Jenkinsfile.yml

Error signal

• Took 0 min 0 sec . View more details here
• Description: Error 'while scanning a simple key in 'reader', line 35, column 1: <<<<<<< HEAD ^could not find expected ':' in 'reader', line 36, column 1: # TODO: there are windows test f ... ^'

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[v1v]

@andrewvc , this backport caused some conflicts, what do we do? Some files don't even exist in 7.17

[mergify]

This pull request has not been merged yet. Could you please review and merge it @v1v? 🙏

[elasticmachine]

Pinging @elastic/uptime (Team:Uptime)