NIFI-12643 Added support for FileResourceService in PutGCSObject

[balazsgerner]

Summary

Added support to upload content directly from local file's inputstream (by-passing the content repository) inside the PutGCSObject processor. The default behaviour is upload from flowfile content to be backward compatible. This can be overridden if the RESOURCE_TRANSFER_SOURCE property value is set to FILE_RESOURCE_SERVICE, and a FileResourceService controller service is registered.

NIFI-12643

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  • JDK 21

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[turcsanyip]

Thanks @balazsgerner for your first contribution!
Tested the new functionality and it works as expected, the code also looks good.
Added one minor comment regarding the position of the new properties on the UI.

[turcsanyip]

Thanks @balazsgerner!

+1 LGTM
Merging...