Fix firebase rules vcr test

[slevenick]

Fixes this test by skipping in VCR as it has non-determinism

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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.
• [ ] Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• [ ] Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• [ ] Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 1 insertion(+)) Terraform Beta: Diff ( 1 file changed, 1 insertion(+)) TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2140 Passed tests 1901 Skipped tests: 229 Failed tests: 10

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccComputeInstance_soleTenantNodeAffinities|TestAccComputeInstance_networkPerformanceConfig|TestAccComputeGlobalForwardingRule_internalLoadBalancing|TestAccCloudfunctions2function_cloudfunctions2BasicGcsExample|TestAccCloudRunService_cloudRunServiceStaticOutboundExample|TestAccCloudFunctions2Function_fullUpdate|TestAccCloudfunctions2function_cloudfunctions2BasicAuditlogsExample|TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample|TestAccSqlDatabaseInstance_SqlServerAuditConfig|TestAccSqlDatabaseInstance_withPrivateNetwork_withAllocatedIpRange

[modular-magician]

Tests passed during RECORDING mode: TestAccCloudfunctions2function_cloudfunctions2BasicGcsExample[view] TestAccCloudFunctions2Function_fullUpdate[view] TestAccCloudfunctions2function_cloudfunctions2BasicAuditlogsExample[view]

Tests failed during RECORDING mode: TestAccComputeInstance_soleTenantNodeAffinities[view] TestAccComputeInstance_networkPerformanceConfig[view] TestAccComputeGlobalForwardingRule_internalLoadBalancing[view] TestAccCloudRunService_cloudRunServiceStaticOutboundExample[view] TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample[view] TestAccSqlDatabaseInstance_SqlServerAuditConfig[view] TestAccSqlDatabaseInstance_withPrivateNetwork_withAllocatedIpRange[view]

Please fix these to complete your PR View the build log or the debug log for each test