fix: Remove use of require in require.Eventually in tests (#3110)

* fix: Remove use of `require` in `require.Eventually` in tests

Because require uses `t.FailNow()` and `require.Eventually` runs the
function in a goroutine, which is not allowed.

* feat: Add ruleguard for require.Eventually

Co-authored-by: Cian Johnston <cian@coder.com>

coderd/devtunnel/tunnel_test.go

@@ -78,7 +78,9 @@ func TestTunnel(t *testing.T) {
 
 	require.Eventually(t, func() bool {
 		res, err := fTunServer.requestHTTP()
-		require.NoError(t, err)
+		if !assert.NoError(t, err) {
+			return false
+		}
 		defer res.Body.Close()
 		_, _ = io.Copy(io.Discard, res.Body)