Migrate resource compute instance from template test to transport_tpg

[jcromanu]

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

compute: migrated `google_compute_instance_from_template_test`  to use direct HTTP rather than a client library

[github-actions]

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

@zli82016, 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.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit 3526184:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	1 file changed, 11 insertions(+), 3 deletions(-)
google-beta provider	View Diff	1 file changed, 11 insertions(+), 3 deletions(-)

Test report

Analytics

Total Tests	Passed	Skipped	Affected
1452	1359	93	0

Affected Service Packages

• compute

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@jcromanu, @zli82016 VCR tests complete for 3526184!

[zli82016]

For the changes in test files, the release note is not needed. Can you modify it? Thanks.