#15897)

Relates to #15894:

- Adds `coderdenttest.NewExternalProvisionerDaemonTerraform`
- Adds integration-style test coverage for creating a workspace with
`coder_workspace_tags` specified in `main.tf`
- Modifies `coderd/wsbuilder` to fetch template version variables and
  includes them in eval context for evaluating `coder_workspace_tags`

(cherry picked from commit dcf5153)
(cherry picked from commit 01f1c94)

(cherry picked from commit 638247c)

…meters (#16023) (#16035)

* Improves tfparse test coverage to include more parameter types and
values
* Adds tests with unrelated parameters that should be ignored by tfparse
* Modifies tfparse to only attempt evaluation of parameters referenced
by coder_workspace_tags

(cherry picked from commit 1ab10cf)

Co-authored-by: Cian Johnston <cian@coder.com>