[KOGITO-9729] - (fix) Preserve directory structure while copying files in builder image

[ricardozanini]

See https://issues.redhat.com/browse/KOGITO-9729

Reopened because the other method was not working properly. ${swf_home_dir} was not a valid variable or directory within the context.

Additionally, now we copy the whole build context. We can't filter since users might upload XML, CSV, images or any other valid resources for their use cases.

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[jakubschwan]

lgtm