chore: join owner, template, and org in new workspace view (#15116)

Joins in fields like `username`, `avatar_url`, `organization_name`,
`template_name` to `workspaces` via a **view**. 
The view must be maintained moving forward, but this prevents needing to
add RBAC permissions to fetch related workspace fields.

coderd/database/migrations/000269_workspace_with_names.down.sql

@@ -0,0 +1 @@
+DROP VIEW workspaces_expanded;

coderd/database/migrations/000269_workspace_with_names.up.sql

@@ -0,0 +1,33 @@
+CREATE VIEW
+	workspaces_expanded
+AS
+SELECT
+	workspaces.*,
+	-- Owner
+	visible_users.avatar_url AS owner_avatar_url,
+	visible_users.username AS owner_username,
+	-- Organization
+	organizations.name AS organization_name,
+	organizations.display_name AS organization_display_name,
+	organizations.icon AS organization_icon,
+	organizations.description AS organization_description,
+    -- Template
+	templates.name AS template_name,
+	templates.display_name AS template_display_name,
+	templates.icon AS template_icon,
+	templates.description AS template_description
+FROM
+	workspaces
+	INNER JOIN
+		visible_users
+	ON
+		workspaces.owner_id = visible_users.id
+	INNER JOIN
+		organizations
+	ON workspaces.organization_id = organizations.id
+	INNER JOIN
+		templates
+	ON workspaces.template_id = templates.id
+;
+
+COMMENT ON VIEW workspaces_expanded IS 'Joins in the display name information such as username, avatar, and organization name.';