Migrate data_source_google_compute_interconnect_location.go data source to use direct HTTP rather than a client library

[GitOleksandrBokov]

Part of the ongoing migration of handwritten compute files from the Apiary client library to direct HTTP calls (transport_tpg.SendRequest). Same pattern as #18444 and the merged data source migrations #17090 / #17117.

• Replaces NewClient(...).InterconnectLocations.Get(project, name).Do() with a GET to projects/{project}/global/interconnectLocations/{name}. Note the REST URL uses camelCase interconnectLocations (same path the typed client used); the Terraform resource ID keeps its historical lowercase interconnectlocations form, so state is unaffected.
• All consumed response fields are plain JSON strings (including peeringdbFacilityId, which is a genuine string in the API), so they are passed to d.Set directly.
• Removes a dead d.SetId(location.Name) that was unconditionally overwritten by the final d.SetId(id) a few lines below.
• No schema, test, or documentation changes. The recorded VCR cassette stays replay-compatible (the matcher strips alt/prettyPrint; the URL path is unchanged).

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compute: migrated `google_compute_interconnect_location` data source to use direct HTTP rather than a client library

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit cc6866f:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	1 file changed, 20 insertions(+), 12 deletions(-)
google-beta provider	View Diff	1 file changed, 20 insertions(+), 12 deletions(-)

Test report

Analytics

Total Tests	Passed	Skipped	Affected
1555	1457	95	3

Affected Service Packages

• compute

Learn how VCR tests work

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Step 1: Replaying Mode

Action taken

Found 3 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit.

Click here to see the affected tests

• TestAccComputeInstanceFromMachineImage_diffProject
• TestAccComputeRouterPeer_UpdateMd5AuthenticationKey
• TestAccComputeSecurityPolicy_withPreconfiguredWafConfig

View the replaying VCR build log

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Step 2: Recording Mode

Recording Mode	Replaying Rerun	Test Name
✅ Log	✅	TestAccComputeRouterPeer_UpdateMd5AuthenticationKey
❌ Error · Log	-	TestAccComputeInstanceFromMachineImage_diffProject
❌ Error · Log	-	TestAccComputeSecurityPolicy_withPreconfiguredWafConfig

Caution

Issues requiring attention before PR completion

🔴 Initial Recording Failed: Some tests failed during the recording step. See the table above for details.

Please address these issues to complete your PR. If you believe these detections are incorrect or unrelated to your change, please raise the concern with your reviewer.

View the recording VCR build log or the debug logs folder for detailed results.

@GitOleksandrBokov VCR tests complete for cc6866f!