fix(store): Fix the TestFileStreamingService unit test. (backport #14305)

[mergify]

This is an automatic backport of pull request #14305 done by Mergify.
Cherry-pick of aba4e6e has failed:

On branch mergify/bp/release/v0.46.x/pr-14305
Your branch is up to date with 'origin/release/v0.46.x'.

You are currently cherry-picking commit aba4e6efb.
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  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
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	both modified:   store/streaming/file/service_test.go

no changes added to commit (use "git add" and/or "git commit -a")

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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