ci: Drop support for Node.js 18 (#15146)

cypress/support/e2e.ts

@@ -12,6 +12,18 @@ before(() => {
 	Cypress.on('uncaught:exception', (error) => {
 		return !error.message.includes('ResizeObserver');
 	});
+
+	// Mock the clipboard API because in newer versions of cypress the clipboard API is flaky when the window is not focussed.
+	Cypress.on('window:before:load', (win) => {
+		let currentContent: string = '';
+		Object.assign(win.navigator.clipboard, {
+			writeText: async (text: string) => {
+				currentContent = text;
+				return await Promise.resolve();
+			},
+			readText: async () => await Promise.resolve(currentContent),
+		});
+	});
 });
 
 beforeEach(() => {