fix(tests): enable windows test with escapes

[jsteinich]

Fixes #810

[jsteinich]

error TS2304: Cannot find name 'onWindows'. I'm not really sure why it isn't finding the defined constant. I didn't have that issue locally.

[ansgarm]

@jsteinich
I think that was moved to some test utility quite recently because it was re-used in another test case as well.
https://github.com/hashicorp/terraform-cdk/blob/main/test/test-helper.ts#L212

[hashicorp-cla]

All committers have signed the CLA.

[jsteinich]

Thanks @ansgarm. Found it and now the specific test is passing. Just failing the terraform cloud test now.

[ansgarm]

Just failing the terraform cloud test now.

Ah, well. We had some weird trouble with that one recently.

[jsteinich]

Seems like we might have some new flakiness with our tests, but the latest run did pass everything.

[github-actions]

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