e2e test for "About Metabase" modal (partial repro for #15656) (#17308)

* Add parial repro for #15656

* Update frontend/test/metabase/scenarios/onboarding/about.cy.spec.js

Co-authored-by: flamber <1447303+flamber@users.noreply.github.com>

frontend/test/metabase/scenarios/onboarding/about.cy.spec.js

+import { restore } from "__support__/e2e/cypress";
+
+describe("scenarios > about Metabase", () => {
+  beforeEach(() => {
+    restore();
+    cy.signInAsAdmin();
+
+    cy.visit("/");
+    cy.icon("gear").click();
+    cy.findByText("About Metabase").click();
+  });
+
+  it.skip("should display correct Metabase version (metabase#15656)", () => {
+    cy.findByText(/You're on version v[01](\.\d+){2,3}(-[\w\d]+)?/i);
+    cy.findByText(/Built on \d{4}-\d{2}-\d{2}/);
+
+    cy.findByText("Branch: ?").should("not.exist");
+    cy.findByText("Hash: ?").should("not.exist");
+  });
+});