Emulator Suite in Google Cloud Shell - TypeError: firebase.initializeTestApp not a function

### Environment info

**firebase-tools:**

**Platform:** Windows 11 / Google Cloud Shell - Emulator Suite, CS Walkthrough

### Test case

Trying to just follow the quickstart testing through Cloud Shell for rules. Getting to step 4 of 11 and it gives the error in the subject line.

"TypeError: firebase.initializeTestApp not a function"

I've looked through the node_modules folder for all the test modules and, no it isn't in the module that the script is looking through. I did see that sometime recently, in a closed issue, initializeTestApp was moved to a different module than it was in before. Perhaps this is the issue.

### Steps to reproduce

Just follow the Cloud Shell tutorial explicitly

### Expected behavior

The Mocha test starts and runs. Test App is initialized. The CS Walkthrough works out of the box.

### Actual behavior

```
jollyren@cloudshell:~/rules-tutorial/quickstart-testing/cs-walkthrough/functions$ npm run test

> test
> mocha --timeout 5000 --exit

/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/node_modules/yargs/yargs.js:1163
else throw err
^

TypeError: firebase.initializeTestApp is not a function
at Suite. (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/test.js:53:23)
at Object.create (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/interfaces/common.js:140:19)
at context.describe.context.context (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/interfaces/bdd.js:42:27)
at Object. (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/test.js:51:1)
at Module._compile (node:internal/modules/cjs/loader:1109:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1138:10)
at Module.load (node:internal/modules/cjs/loader:989:32)
at Function.Module._load (node:internal/modules/cjs/loader:829:14)
at Module.require (node:internal/modules/cjs/loader:1013:19)
at require (node:internal/modules/cjs/helpers:93:18)
at /home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/mocha.js:334:36
at Array.forEach ()
at Mocha.loadFiles (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/mocha.js:331:14)
at Mocha.run (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/mocha.js:811:10)
at Object.exports.singleRun (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/cli/run-helpers.js:108:16)
at exports.runMocha (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/cli/run-helpers.js:142:13)
at Object.exports.handler (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/cli/run.js:292:3)
at Object.runCommand (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/node_modules/yargs/lib/command.js:242:26)
at Object.parseArgs [as _parseArgs] (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/node_modules/yargs/yargs.js:1104:24)
at Object.parse (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/node_modules/yargs/yargs.js:566:25)
at Object.exports.main (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/lib/cli/cli.js:68:6)
at Object. (/home/jollyren/rules-tutorial/quickstart-testing/cs-walkthrough/functions/node_modules/mocha/bin/mocha:164:29)
at Module._compile (node:internal/modules/cjs/loader:1109:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1138:10)
at Module.load (node:internal/modules/cjs/loader:989:32)
at Function.Module._load (node:internal/modules/cjs/loader:829:14)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)
at node:internal/main/run_main_module:17:47