npm workspaces support broken since 11.19.0

[mpsq]

Firebase CLI is broken since #5215 when using npm workspaces. (11.18.0 works fine)

Environment info

• firebase-tools 11.19.0
• npm 8.18
• node 16
• npm workspaces
• Archlinux

Test case

Steps to reproduce

Any firebase cli command with npm workspaces set up

Expected behavior

Command should succeed

Actual behavior

Errors (not sure the 1st is relevant):

Could not find functions.yaml. Must use http discovery
Error: spawn ./node_modules/.bin/firebase-functions ENOENT

[mpsq]

The issue seems to be on https://github.com/firebase/firebase-tools/blob/master/src/deploy/functions/runtimes/node/index.ts#L111, this.sourceDir references the module and not the root (where node_modules is)

[joehan]

@taeold Seems like this may be related to #4952?

[taeold]

Thanks @joehan. Closing in favor of #4952