vertexai: promote context_spec to GA on reasoning_engine

[slevenick]

Promote context_spec to GA on google_vertex_ai_reasoning_engine.

reference: b/550544674

vertexai: added `context_spec` field to `google_vertex_ai_reasoning_engine` (ga)

[slevenick]

/gcbrun needs the updated build_spec GA

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit 729648a:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	5 files changed, 3430 insertions(+), 479 deletions(-)
google-beta provider	View Diff	3 files changed, 10 insertions(+), 28 deletions(-)
Open in Cloud Shell	View Diff	4 files changed, 128 insertions(+)

Test report

Important

Manual Verification Required (GA-only additions)

The following tests are GA-only additions and cannot be run by VCR in Beta mode. Please verify them manually:

🔴 TestAccVertexAIReasoningEngine_customizationConfigsUpdate
🔴 TestAccVertexAIReasoningEngine_memoryGenerationTriggerUpdate
🔴 TestAccVertexAIReasoningEngine_vertexAiReasoningEngineGranularTtlExample

Analytics

Total Tests	Passed	Skipped	Affected
115	106	7	2

Affected Service Packages

• vertexai

Learn how VCR tests work

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Step 1: Replaying Mode

Action taken

Found 2 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit.

Click here to see the affected tests

• TestAccVertexAIFeatureOnlineStoreFeatureview_vertexAiFeatureonlinestoreFeatureview_featureRegistry_updated
• TestAccVertexAISemanticGovernancePolicyEngine_basic

View the replaying VCR build log

---

Step 2: Recording Mode

Recording Mode	Replaying Rerun	Test Name
❌ Error · Log	-	TestAccVertexAIFeatureOnlineStoreFeatureview_vertexAiFeatureonlinestoreFeatureview_featureRegistry_updated
❌ Error · Log	-	TestAccVertexAISemanticGovernancePolicyEngine_basic

Caution

Issues requiring attention before PR completion

🔴 Manual Verification Required: New tests were added that are skipped in presubmit tests. See the "Manual Verification Required" section at the top for details.

🔴 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.

@slevenick, @melinath VCR tests complete for 729648a!

[slevenick]

New run: https://hashicorp.teamcity.com/buildConfiguration/TerraformProviders_GoogleCloud_GOOGLE_MMUPSTREAMTESTS_GOOGLE_PACKAGE_VERTEXAI/732738

Needed to regenerate to pull in build_spec GA