Remove use of ENHANCED performance_monitoring_unit in tests for compute instances

[roaks3]

This was requested by the internal team due to some issues they are currently working through with the setting.

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

[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 ( 3 files changed, 45 deletions(-))
google-beta provider: Diff ( 3 files changed, 45 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1257
Passed tests: 1168
Skipped tests: 86
Affected tests: 3

Click here to see the affected service packages

• compute

#### Action taken

Found 3 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

• TestAccComputeInstanceTemplate_performanceMonitoringUnit
• TestAccComputeInstance_performanceMonitoringUnit
• TestAccComputeRegionInstanceTemplate_performanceMonitoringUnit

Get to know how VCR tests work

[modular-magician]

🟢 Tests passed during RECORDING mode:
TestAccComputeInstanceTemplate_performanceMonitoringUnit [Debug log]
TestAccComputeInstance_performanceMonitoringUnit [Debug log]
TestAccComputeRegionInstanceTemplate_performanceMonitoringUnit [Debug log]

🟢 No issues found for passed tests after REPLAYING rerun.

---

🟢 All tests passed!

View the build log or the debug log for each test

[roaks3]

@modular-magician reassign-reviewer

[github-actions]

Hello! I am a robot. Tests will require approval from a repository maintainer to run.

Googlers: For automatic test runs see go/terraform-auto-test-runs.

@c2thorn, a repository maintainer, has been assigned to review your changes. If you have not received review feedback within 2 business days, please leave a comment on this PR asking them to take a look.

You can help make sure that review is quick by doing a self-review and by running impacted tests locally.