upgrade to ui5-webC version 1.14

[droshev]

Is this a bug, enhancement, or feature request?

enhancement

Briefly describe your proposal.

tasks:

• run lighthouse before the update and after the update and check the impact

• update to Version 1.14 the ui5 WebC there was a change which should affect the performance (in a positive way). More info in the PR.
  ignoreCustomElements

It needs to import

import { ignoreCustomElements } from "@ui5/webcomponents-base/dist/IgnoreElements.js";

ignoreCustomElements("app-");