Add bundle debug terraform command

[ilia-db]

• Add bundle debug terraform command. It prints versions of the Terraform and the Databricks Terraform provider. In the text mode it also explains how to setup the CLI in environments with restricted internet access.
• Use DATABRICKS_TF_EXEC_PATH env var to point Databricks CLI to the Terraform binary. The CLI only uses it if DATABRICKS_TF_VERSION matches the currently used terraform version.
• Use DATABRICKS_TF_CLI_CONFIG_FILE env var to point Terraform CLI config that points to the filesystem mirror for the Databricks provider. The CLI only uses it if DATABRICKS_TF_PROVIDER_VERSION matches the currently used provider version.

Relevant PR on the VSCode extension side: databricks/databricks-vscode#1147

Example output of the databricks bundle debug terraform:

Terraform version: 1.5.5
Terraform URL: https://releases.hashicorp.com/terraform/1.5.5
Databricks Terraform Provider version: 1.38.0
Databricks Terraform Provider URL: https://github.com/databricks/terraform-provider-databricks/releases/tag/v1.38.0
Databricks CLI downloads its Terraform dependencies automatically.
If you run the CLI in an air-gapped environment, you can download the dependencies manually and set these environment variables:
DATABRICKS_TF_VERSION=1.5.5
DATABRICKS_TF_EXEC_PATH=/path/to/terraform/binary
DATABRICKS_TF_PROVIDER_VERSION=1.38.0
DATABRICKS_TF_CLI_CONFIG_FILE=/path/to/terraform/cli/config.tfrc
Here is an example *.tfrc configuration file:
disable_checkpoint = true
provider_installation {
filesystem_mirror {
path = "/path/to/a/folder/with/databricks/terraform/provider"
}
}
The filesystem mirror path should point to the folder with the Databricks Terraform Provider. The folder should have this structure: /registry.terraform.io/databricks/databricks/terraform-provider-databricks_1.38.0_ARCH.zip
For more information about filesystem mirrors, see the Terraform documentation: https://developer.hashicorp.com/terraform/cli/config/config-file#filesystem_mirror

[pietern]

Please update the PR summary to be up to date with the most recent revision.

Everything else LGTM.