feat: not consume reservation samples

[BigBlackWolf]

Description

Samples, which demonstrates how to create VMs, without consuming reservation. Related doc: https://cloud.google.com/compute/docs/instances/reservations-consume#create-vm-not-consume-reservations

Checklist

• [ ] I have followed Contributing Guidelines from CONTRIBUTING.MD
• [ ] Tests pass: go test -v ./.. (see Testing)
• [ ] Code formatted: gofmt (see Formatting)
• [ ] Vetting pass: go vet (see Formatting)
• [ ] 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)
• [ ] 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

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 2 region tags.

- [compute/reservations/create_instance_not_consume_reservation.go:17](https://github.com/GoogleCloudPlatform/golang-samples/blob/a1574b9cb9c94a0a0c4eb8d9ce3dd54d03c0fb45/compute/reservations/create_instance_not_consume_reservation.go#L17), tag `compute_instance_not_consume_reservation` - [compute/reservations/create_template_not_consume_reservation.go:17](https://github.com/GoogleCloudPlatform/golang-samples/blob/a1574b9cb9c94a0a0c4eb8d9ce3dd54d03c0fb45/compute/reservations/create_template_not_consume_reservation.go#L17), tag `compute_template_not_consume_reservation`

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