build: inline external Github Actions to unblock CI (#12241)

* build: inline cached-dependencies to unblock CI

* Run E2E on pull_request on;y

* Inline all external actions

* Checkout needed for internal actions

Also fixes pre-commit

* Add missing files

.github/actions/cached-dependencies/__tests__/fixtures/bashlib.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+default-setup-command() {
+  print-cachescript-path
+}

.github/actions/cached-dependencies/__tests__/fixtures/caches.ts

@@ -0,0 +1,14 @@
+/**
+ * Example cache config.
+ */
+export const npmHashFiles = ['.*ignore'];
+export const npmExpectedHash =
+  '13ed29a1c7ec906e7dcb20626957ebfcd3f0f2174bd2685a012105792bf1ff55';
+
+export default {
+  npm: {
+    path: [`~/.npm`],
+    hashFiles: npmHashFiles,
+    restoreKeys: 'node-npm-',
+  },
+};