feat: add includeFoldersAsPrefixes for managed folders

[ddelgrosso1]

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Fixes #2384 🦕

[ddelgrosso1]

There are some assumptions baked into the paginator dependency. The biggest issue is that paginator assumes only a single return value whereas getFiles returns not only File objects but the raw response. In order to access prefixes on the raw response autoPaginate must be set to false.

Fixing this in paginator is not a straightforward process and would likely break other libraries.

[frankyn]

This doesn't confirm a specific managed folder is in the list of prefixes; It might be the best we can do right now though because you'd need to make a one-off request to create a managed folder through Apiary Node.js client to verify functionality.

[ddelgrosso1]

By apiary you mean storage control?

[frankyn]

No, there's support in Storage v1 json apiary that has CreateManagedFolder RPC which would help with this test until Storage Control is available.

[ddelgrosso1]

Probably beyond the scope of this change to start pulling in other dependencies just for a single test case.

[danielbankhead]

When do we plan on adding the create functionality in this library?