[Internal] Host Agnostic Support for Current Config Data Source

[tanmay-db]

Changes

• Add an optional cloud argument to databricks_current_config that accepts aws, azure, or gcp
• When set, cloud_type uses the provided value instead of relying on host-based detection
• When not set, falls back to existing behavior (auto-detect from provider configuration)
• Validated via StringInSlice — invalid or empty values are rejected at plan time

Tests

• Unit tests: cloud override (gcp, azure, aws), account-level override, invalid value rejection, empty value rejection
• Acceptance tests: cloud override at workspace level (aws, azure, gcp) and account level
• Existing unit tests still pass
• make fmt lint ws clean

[github-actions]

If integration tests don't run automatically, an authorized user can run them manually by following the instructions below:

Trigger:
go/deco-tests-run/terraform

Inputs:

• PR number: 5519
• Commit SHA: ce69446ada5c6e5241e1422b85aff1b26719123d

Checks will be approved automatically on success.