resolve permissions: drives

[jashkahar]

This adds the drives workflow permission to the schema so it validates cleanly, while keeping it hidden from autocomplete until GA.

Gated behind the allowDrivesPermissionAutocomplete ff.

[Copilot]

Pull request overview

Adds support for the drives workflow permission in the workflow schema so workflows validate successfully, while gating its appearance in autocomplete behind a feature flag until GA.

Changes:

• Add permissions.drives to workflow-v1.0.json with the appropriate permission-level type and description.
• Gate drives permission key completion behind allowDrivesPermissionAutocomplete in the language service.
• Introduce the allowDrivesPermissionAutocomplete experimental feature flag and add completion tests for enabled/disabled/default behavior (including job-level permissions).

Show a summary per file

File	Description
workflow-parser/src/workflow-v1.0.json	Adds drives to the permissions mapping so schema validation accepts it.
languageservice/src/complete.ts	Filters drives from permissions-key completions unless the feature flag is enabled.
languageservice/src/complete.test.ts	Adds coverage for drives completion behavior at workflow and job scopes under the feature flag.
expressions/src/features.ts	Defines the new experimental feature flag and registers it in allFeatureKeys.
expressions/src/features.test.ts	Ensures the new feature flag key is included in the known feature key list.

Review details

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• Files reviewed: 5/5 changed files
• Comments generated: 0
• Review effort level: Low