[FR] Let specify function region: `getFunctions(undefined, 'southamerica-east1')`

[gustavopch]

Is your feature request related to a problem? Please describe.
Not applicable.

Describe the solution you'd like
I need to specify the region of the function that I'm calling when enqueuing a task with firebase-admin:

await getFunctions().taskQueue('foo').enqueue({
  id: '123',
})

Describe alternatives you've considered
None.

EDIT: Just found that it's possible to specify the region like the following snippet, but maybe still consider adding the region parameter to getFunctions() to make it similar to the JS SDK (as also suggested here) or at least mention this in the docs:

await getFunctions().taskQueue('locations/southamerica-east1/functions/foo').enqueue({
  id: '123',
})

Additional context
Firebase JS SDK works that way. You can pass the region as the second argument to getFunctions(): https://firebase.google.com/docs/reference/js/functions.md#getfunctions

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