make dataflow_job.additional_experiments O+C

[megan07]

fixes all the failing dataflow job tests
https://ci-oss.hashicorp.engineering/buildConfiguration/GoogleCloud_ProviderGoogleCloudGoogleProject/322322?buildTab=tests&status=failed&expandedTest=6896983620954924475

If this PR is for Terraform, I acknowledge that I have:

• 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)

dataflow: fixed bug where permadiff would show on `google_dataflow_job.additional_experiments`

[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: 2124
Passed tests 1889
Skipped tests: 227
Failed tests: 8

Action taken

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

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

[modular-magician]

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

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

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

[shuyama1]

LGTM! Related test passed: https://ci-oss.hashicorp.engineering/buildConfiguration/GoogleCloudBeta_ProviderGoogleCloudBetaMmUpstream/322371?buildTab=tests&status=passed