[Java][Dataset][MacOS] Enable GCS

[davisusanibar]

Describe the enhancement requested

Enables GCS on MacOS when building the Arrow Dataset for Java.

Component(s)

Continuous Integration, Java

[ddlenz]

@davisusanibar any timeline on this?

[vibhatha]

cc @danepitkin @lidavidm

[lidavidm]

Nobody's working on it. Contributions are encouraged.

[brokenjacobs]

Any guidance on how to test this potential PR without triggering CI? Looks very Github dependent, and local environments will have their own brew configs. Not something a first time contributor can tackle easily.