improvement: extend compute_hyperdisk_pool_create

Description

Fixes #

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[x] I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
[x] Tests pass: npm test (see Testing)
[x] Lint pass: npm run lint (see Style)
[ ] These samples need a new API enabled in testing projects to pass (let us know which ones)
[ ] These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
[x] This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
[ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
[ ] This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
[ ] This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
[x] Please merge this PR for me once it is approved