chore: remove local storage based optin/optout (#18344)

This removes the opt-in and opt-out buttons for dynamic parameters on
the create workspace page and the workspace parameters settings page.

---------

Co-authored-by: Steven Masley <stevenmasley@gmail.com>

coderd/parameters_test.go

@@ -249,6 +249,7 @@ func TestDynamicParametersWithTerraformValues(t *testing.T) {
 					Value: "GO",
 				},
 			}
+			request.EnableDynamicParameters = true
 		})
 		coderdtest.AwaitWorkspaceBuildJobCompleted(t, setup.client, wrk.LatestBuild.ID)