fix(transfer): add non-decorated shared transfer function

[ividito]

To avoid ValueErrors when calling transfer_data, refactor tasks to invoke a shared transfer function, rather than calling a task from another task (which caused issues with the ti parameter).

[anayeaye]

The payload transformation is running in dev sm2a and seems to be working as expected. We do see a data access permission issue from the ingest API which is unexpected but also the dev api is not intended to generate metadata for assets in production anyway.

For the promotion step I think we may want to ask users (and automated events) to add both
transfer: true and
target_bucket: veda-data-store or the instance production bucket equivalent in configuration for the promotion DAG. In this PR all defaults are for veda production. What do you think?
cc: @smohiudd @slesaad @botanical