Update provisionerdserver to handle the changes introduced to
provisionerd in https://github.com/coder/coder/pull/21602
We now create a relationship between `workspace_agent_devcontainers` and
`workspace_agents` with the newly created `subagent_id`.
In the presence of multiple devcontainers, it would be nice to
differentiate them by name. This change inherits the resource name from
terraform.
Refs #17076
This change allows specifying devcontainers in terraform and plumbs it
through to the agent via agent manifest.
This will be used for autostarting devcontainers in a workspace.
Depends on coder/terraform-provider-coder#368
Updates #16423
Danielle Maywood