Use aria descriptions instead of labels for TextWithTooltip (#10952)

* Use aria descriptions instead of labels for TextWithTooltip

to prevent clobbering the reading of the content

* Update snapshot

* Fix snapshots

* Iterate

* Update snapshots

* delint

test/components/views/beacon/DialogSidebar-test.tsx

@@ -27,6 +27,11 @@ import {
     mockClientMethodsUser,
 } from "../../../test-utils";
 
+// Fake random strings to give a predictable snapshot for IDs
+jest.mock("matrix-js-sdk/src/randomstring", () => ({
+    randomString: () => "abdefghi",
+}));
+
 describe("<DialogSidebar />", () => {
     const defaultProps: ComponentProps<typeof DialogSidebar> = {
         beacons: [],