test: dont assert websocket closes without error (#25573)

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fixes https://github.com/coder/internal/issues/1541  
  
Closing websockets can race whether they return an error or not if the remote side closes too. Dropping some test assertions about this since it is not critical to what we are testing.

coderd/workspaceconnwatcher/watcher_test.go

@@ -277,8 +277,7 @@ func TestWatcher_LostAccess(t *testing.T) {
 	dec, err := h.Dial(ctx, "wss://local.test/")
 	require.NoError(t, err)
 	defer func() {
-		err := dec.Close()
-		require.NoError(t, err)
+		_ = dec.Close()
 	}()
 	events := dec.Chan()
 	e0 := testutil.RequireReceive(ctx, t, events)
@@ -312,8 +311,7 @@ func TestWatcher_PublishChanges(t *testing.T) {
 	dec, err := h.Dial(ctx, "wss://local.test/")
 	require.NoError(t, err)
 	defer func() {
-		err := dec.Close()
-		require.NoError(t, err)
+		_ = dec.Close()
 	}()
 	events := dec.Chan()