CI: Switch jest unit tests to self-hosted runners (#109304)

* trigger a workflow run for baseline

* attempt to improve caching with upfront action

* CYPRESS_INSTALL_BINARY: 0

* PUPPETEER_SKIP_DOWNLOAD: true

* use ubuntu-x64-large runners

* increase to 16 shards 🚀

* fix incorrect shard total

* ubuntu-x64 runners

* Revert "ubuntu-x64 runners"

This reverts commit 3411c7c5e1039263b17a3065cd7d45fa4c3c8f69.

* try caching node_modules

* fix flakey scopes test

* try just ubuntu-x64-large for yarn-install job

* run again, last one had a dodgy trace

* try different runners for yarn instlal

* Move node_modules cache steps to composite action, use ubuntu-x64 runners for everything

* fix duplicate runs-on

* specify shell for composite action

* fix some flaky tests

* update codeowners

* dedupe yarn.lock

* align yarn action, switch tests back to ubuntu-x64-large

* align yarn action cache keys

* fix required-frontend-unit-tests not checking repo out

* try without the node_modules magic

* actually skip the node_modules caching magic

* skip hardened mode

* skip downloading cypress

* comment

.github/workflows/deploy-storybook-preview.yml

@@ -32,19 +32,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version-file: '.nvmrc'
-          cache: 'yarn'
-
-      - name: Cache node_modules
-        uses: actions/cache@v4
-        with:
-          path: |
-            node_modules
-          key: node_modules-${{ hashFiles('yarn.lock') }}
-          restore-keys: |
-            node_modules-
+        uses: ./.github/actions/setup-node
 
       - name: Install dependencies
         env: