Fix bug with pages_deployments files not being deleted on disk

What does this MR do and why?

Fix bug with pages_deployments files not being deleted on disk

This fixes a regression in !132252 (merged). More details in this lengthy writeup: #432689 (closed)

This is a backport of the bugfix merged in Fix bug with pages_deployments files not being ... (!137645 - merged) • Per Lundberg • 16.7 with @perlun's help to 16.6

MR acceptance checklist

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• This MR is backporting a bug fix, documentation update, or spec fix, previously merged in the default branch.
• The MR that fixed the bug on the default branch has been deployed to GitLab.com (not applicable for documentation or spec changes).
• This MR has a severity label assigned (if applicable).
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• Ensure the e2e:package-and-test-ee job has either succeeded or been approved by a Software Engineer in Test.

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