allow the workspace call to return the location created

[peetucket]

Why was this change made? 🤔

ocrWF will be making a call to create the relevant /dor/workspace druid tree directory. It will not need the source path and symlink, it just wants to the workspace folder. So this:

• removes the HB alert since we this will be the first consumer to not be sending in the source
• allows DSA to return the directory location created, so it can be used by the caller
• allows client to request metadata and/or content subdirectories also be created (but only if no source is passed in, since if source is passed in, the subdirectories should already exist at the source, and the created directory is actually just a symlink there)

There is a corresponding dor-services-client PR to grab the location and return to the consumer.

How was this change tested? 🤨

Updated existing spec Created a new spec Localhost using updated dor-services-client: https://github.com/sul-dlss/dor-services-client/pull/436

[peetucket]

Added the ability to request the content and/or metadata subfolders be created as well. This will be useful for the OCR work too (where we want the content subfolder if it doesn't exist).