feat: secure and cross-domain subdomain-based proxying (#4136)

Co-authored-by: Kyle Carberry <kyle@carberry.com>

coderd/httpmw/workspaceagentparam_test.go

@@ -132,7 +132,10 @@ func TestWorkspaceAgentParam(t *testing.T) {
 		db := databasefake.New()
 		rtr := chi.NewRouter()
 		rtr.Use(
-			httpmw.ExtractAPIKey(db, nil, false),
+			httpmw.ExtractAPIKey(httpmw.ExtractAPIKeyConfig{
+				DB:              db,
+				RedirectToLogin: false,
+			}),
 			httpmw.ExtractWorkspaceAgentParam(db),
 		)
 		rtr.Get("/", func(rw http.ResponseWriter, r *http.Request) {