Move Jest preprocessor up to workspace root, remove public metro-react-native-babel-transformer dep (#36523)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36523

`jest/private/preprocessor.js` is only used to run tests on the workspace itself, it's not part of our exported Jest preset and is specifically excluded from publication in the `react-native` package.

Now that we have the monorepo setup, this belongs at the workspace root.

 - `metro-react-native-babel-transformer` moved from RN `dependencies` to root `devDependencies` because it's only used by the preprocessor
 - `jest/create-cache-key-function` added to `devDependencies` - it's also used by the `assetTransformer` in the public preset.

Changelog: [Internal]

Reviewed By: hoxyq

Differential Revision: D44197879

fbshipit-source-id: 0bbd9e2f500f53fa4f16562f05374dc601b67df6

jest.config.js

@@ -13,7 +13,7 @@ module.exports = {
   transform: {
     '^.+\\.(bmp|gif|jpg|jpeg|mp4|png|psd|svg|webp)$':
       '<rootDir>/packages/react-native/jest/assetFileTransformer.js',
-    '.*': './packages/react-native/jest/private/preprocessor.js',
+    '.*': './jest/preprocessor.js',
   },
   setupFiles: ['./packages/react-native/jest/local-setup.js'],
   fakeTimers: {

package.json

@@ -55,6 +55,7 @@
     "@babel/generator": "^7.20.0",
     "@babel/plugin-transform-regenerator": "^7.0.0",
     "@definitelytyped/dtslint": "^0.0.127",
+    "@jest/create-cache-key-function": "^29.2.1",
     "@reactions/component": "^2.0.2",
     "@types/react": "^18.0.18",
     "@typescript-eslint/parser": "^5.30.5",
@@ -84,6 +85,7 @@
     "jscodeshift": "^0.14.0",
     "metro-babel-register": "0.75.1",
     "metro-memory-fs": "0.75.1",
+    "metro-react-native-babel-transformer": "0.75.1",
     "mkdirp": "^0.5.1",
     "mock-fs": "^5.1.4",
     "prettier": "^2.4.1",

packages/react-native/package.json

@@ -24,7 +24,6 @@
     "interface.js",
     "jest-preset.js",
     "jest",
-    "!jest/private",
     "Libraries",
     "LICENSE",
     "local-cli",
@@ -96,7 +95,6 @@
     "jest-environment-node": "^29.2.1",
     "jsc-android": "^250231.0.0",
     "memoize-one": "^5.0.0",
-    "metro-react-native-babel-transformer": "0.75.1",
     "metro-runtime": "0.75.1",
     "metro-source-map": "0.75.1",
     "mkdirp": "^0.5.1",