feat: Move workspaces under organizations (#1109)

This removes split ownership for workspaces. They are now
a resource of organizations and have a designated owner,
which is a user.

This enables simple administration for commands like:
- `coder stop ben/dev`
- `coder build logs colin/arch`

or if we decide to allow administrators to access workspaces,
they could even SSH using this syntax: `coder ssh colin/dev`.

coderd/workspaceresources_test.go

@@ -7,7 +7,6 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/coder/coder/coderd/coderdtest"
-	"github.com/coder/coder/codersdk"
 	"github.com/coder/coder/provisioner/echo"
 	"github.com/coder/coder/provisionersdk/proto"
 )
@@ -38,7 +37,7 @@ func TestWorkspaceResource(t *testing.T) {
 		})
 		coderdtest.AwaitTemplateVersionJob(t, client, version.ID)
 		template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
-		workspace := coderdtest.CreateWorkspace(t, client, codersdk.Me, template.ID)
+		workspace := coderdtest.CreateWorkspace(t, client, user.OrganizationID, template.ID)
 		coderdtest.AwaitWorkspaceBuildJob(t, client, workspace.LatestBuild.ID)
 		resources, err := client.WorkspaceResourcesByBuild(context.Background(), workspace.LatestBuild.ID)
 		require.NoError(t, err)