[encoderpatch] Patch TextEncoder/TextDecoder for tests (#2307)

## Summary:
React 18 requires these things but JSDOM doesn't include them, so we shim them

Issue: XXX-XXXX

## Test plan:
`yarn test` before React 18 update and after.

Author: somewhatabstract

Reviewers: jeresig

Required Reviewers:

Approved By: jeresig

Checks: ✅ Chromatic - Get results on regular PRs (ubuntu-latest, 20.x), ✅ Test (ubuntu-latest, 20.x, 2/2), ✅ Test (ubuntu-latest, 20.x, 1/2), ✅ Lint (ubuntu-latest, 20.x), ✅ Check build sizes (ubuntu-latest, 20.x), ✅ Chromatic - Build on regular PRs / chromatic (ubuntu-latest, 20.x), ⏭️  Chromatic - Skip on Release PR (changesets), ✅ Publish npm snapshot (ubuntu-latest, 20.x), ✅ Prime node_modules cache for primary configuration (ubuntu-latest, 20.x), ✅ Check for .changeset entries for all changed files (ubuntu-latest, 20.x), ✅ gerald, ⏭️  dependabot

Pull Request URL: #2307

config/jest/test-setup.js

@@ -3,9 +3,26 @@ const {StyleSheetTestUtils} = require("aphrodite");
 const {
     mockRequestAnimationFrame,
 } = require("../../utils/testing/mock-request-animation-frame");
+const {TextEncoder, TextDecoder} = require("util");
 
 StyleSheetTestUtils.suppressStyleInjection();
 
+
+const attachShims = (targetWindow) => {
+    if (!targetWindow.TextEncoder) {
+        targetWindow.TextEncoder = TextEncoder;
+    }
+    if (!targetWindow.TextDecoder) {
+        targetWindow.TextDecoder = TextDecoder;
+    }
+}
+
+const resetWindow = () => {
+    attachShims(globalThis);
+};
+resetWindow();
+
 beforeEach(() => {
+    resetWindow();
     mockRequestAnimationFrame();
 });