feat(compute): add compute reservation create from vm sample.

[TetyanaYahodska]

Description

Python sample - https://github.com/GoogleCloudPlatform/python-docs-samples/blob/98d8ab5055a541ef2ec1e78d75b8cda36f30f849/compute/client_library/snippets/compute_reservations/create_compute_reservation_from_vm.py#L21

Fixes #<ISSUE-NUMBER>

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Checklist

• [x] I have followed Sample Format Guide
• [ ] pom.xml parent set to latest shared-configuration
• [ ] Appropriate changes to README are included in PR
• [ ] 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] Tests pass: mvn clean verify required
• [x] Lint passes: mvn -P lint checkstyle:check required
• [ ] Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• [ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners 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
• [ ] Please merge this PR for me once it is approved