[Feature] Add datasource `databricks_users`

[nkvuong]

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Changes

Continuing #4028 Added databricks_users data source as requested in #3468 to retrieve multiple users from both the account and workspace-level APIs with optional filtering by display_name_contains or user_name_contains, enabling bulk user management operations.

Closes #3468

Tests

• [x] make test run locally
• [x] relevant change in docs/ folder
• [x] covered with integration tests in internal/acceptance
• [x] relevant acceptance tests are passing
• [x] using Go SDK

[nkvuong]

There is an issue with the tfsdk structs generated for SCIM

[github-actions[bot]]

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: 4537
• Commit SHA: 9d70097cf7ab43213388525a0f4e8cd5582caba1

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