Move import rake task classes into a service

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The following discussion from !71402 (merged) should be addressed:

• @dstull started a discussion: (+1 comment)

  A lot of code in here that is hard to test due to placement in a rake task and reduces the ability to DRY up the code with other areas...

  Should we spawn a follow-up to discuss moving the classes defined in here to a more testable area like services?