BDX EndDownload API should take bdx::StatusCode

[carol-apple]

I feel that mapping one error code to another is kind of abuse of the type :), so maybe we should change EndDownload to take bdx::StatusCode directly instead of CHIP_ERROR (if the goal is to send a particular status code), but we can do that later.

Originally posted by @Damian-Nordic in #15227 (comment)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[stale]

This stale issue has been automatically closed. Thank you for your contributions.