Upstream fix for GCS object owner is optional

[modular-magician]

Upstreams #10902

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• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
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• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

storage: Fixed bug where the provider crashes when `Object.owner` is missing when using `google_storage_object_acl`

Derived from GoogleCloudPlatform/magic-modules#5618

[github-actions]

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