fix: Remove resource addresses (#982)

These were added under the impression that there was significant
user-experience impact if multiple resources share the same name.

This hasn't proven to be true yet, so figured we'd take this out
until it becomes necessary.

coderd/database/migrations/000004_jobs.up.sql

@@ -66,7 +66,6 @@ CREATE TABLE workspace_resources (
     created_at timestamptz NOT NULL,
     job_id uuid NOT NULL REFERENCES provisioner_jobs (id) ON DELETE CASCADE,
     transition workspace_transition NOT NULL,
-    address varchar(256) NOT NULL,
     type varchar(192) NOT NULL,
     name varchar(64) NOT NULL,
     PRIMARY KEY (id)