feat: expose configId output field in google_discovery_engine_widget_config

[gwendal-lecren]

This exposes the config_id of the widget config as output only.

Fixes hashicorp/terraform-provider-google#27047

discoveryengine: added `config_id` attribute to `google_discovery_engine_widget_config`

[github-actions]

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[modular-magician]

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

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 4 files changed, 24 insertions(+))
google-beta provider: Diff ( 4 files changed, 24 insertions(+))
Open in Cloud Shell: Diff ( 1 file changed, 4 insertions(+))

[modular-magician]

Tests analytics

Total tests: 40
Passed tests: 35
Skipped tests: 4
Affected tests: 1

Click here to see the affected service packages

• discoveryengine

Action taken

Found 1 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

Get to know how VCR tests work

[modular-magician]

🔴 Tests failed during RECORDING mode:
TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample [Error message] [Debug log]

🔴 Errors occurred during RECORDING mode. Please fix them to complete your PR.

View the build log or the debug log for each test

[github-actions]

@GoogleCloudPlatform/terraform-team @trodge This PR has been waiting for review for 2 weeks. Please take a look! Use the label disable-review-reminders to disable these notifications.