ignore update_time in anywhere_cache test case

[gurusai-voleti]

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Fixes: hashicorp/terraform-provider-google#25170

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 1 file changed, 4 insertions(+), 3 deletions(-))
google-beta provider: Diff ( 1 file changed, 4 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 126
Passed tests: 116
Skipped tests: 10
Affected tests: 0

Click here to see the affected service packages

• storage

🟢 All tests passed!

View the build log

[github-actions]

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[github-actions]

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[github-actions]

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