Modify the primary resource name for disk_async test

[zli82016]

The resource secondary should be the primary resource in the acceptance test to test its field async_primary_disk

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[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, 1 insertion(+), 1 deletion(-))
google-beta provider: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[modular-magician]

Tests analytics

Total tests: 1225
Passed tests: 1141
Skipped tests: 83
Affected tests: 1

Click here to see the affected service packages

• compute

#### Action taken

Found 1 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

• TestAccComputeDisk_diskAsyncExample

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[modular-magician]

🟢 Tests passed during RECORDING mode:
TestAccComputeDisk_diskAsyncExample [Debug log]

🟢 No issues found for passed tests after REPLAYING rerun.

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🟢 All tests passed!

View the build log or the debug log for each test