discoveryengine: add search_addon_spec to google_discovery_engine_widget_config

[slevenick]

Added field coverage for uiSettings.searchAddonSpec on google_discovery_engine_widget_config (discoveryengine:v1:WidgetConfig).

reference: b/558780349

discoveryengine: added `ui_settings.search_addon_spec` field to `google_discovery_engine_widget_config`

[slevenick]

@modular-magician reassign-reviewer

[github-actions]

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

@ScottSuarez, 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 91599bf:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	4 files changed, 163 insertions(+)
google-beta provider	View Diff	4 files changed, 163 insertions(+)
terraform-google-conversion	View Diff	1 file changed, 55 insertions(+)

Test report

Analytics

Total Tests	Passed	Skipped	Affected
53	47	4	2

Affected Service Packages

• discoveryengine

Learn how VCR tests work

---

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

• TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample
• TestAccDiscoveryEngineWidgetConfig_discoveryengineWidgetconfigBasicExample_update

View the replaying VCR build log

---

Step 2: Recording Mode

Recording Mode	Replaying Rerun	Test Name
✅ Log	✅	TestAccDiscoveryEngineWidgetConfig_discoveryengineWidgetconfigBasicExample_update
❌ Error · Log	-	TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample

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.

@slevenick, @ScottSuarez VCR tests complete for 91599bf!