[Python] Add built wheel to manylinux1 dockerignore. #21128
Description
Currently we add them to the docker context while we don't need them. This shrinks the context for me down to 55k instead of hundreds MiBs.
Reporter: Uwe Korn / @xhochy
Assignee: Uwe Korn / @xhochy
PRs and other links:
Note: This issue was originally created as ARROW-4584. Please see the migration documentation for further details.