[Feature] Added "databricks_groups" data resource to list all the groups in the databricks account.

[sergiumpopa]

Changes

Added a databricks_groups data resource to list all groups in the account - it addresses #3432. The resource returns only the display_name field from the groups, which can then be used with the databricks_group data resource to retrieve more information.

It accepts filter as an argument, with the same functionality as the API parameter.

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