[RFE] Custom Migration Targets

[dymurray]

Through interaction with different focus user groups in the field, it has been discovered that configuring custom rules on each analysis run can be cumbersome and doesn't scale well when dealing with third party factories, as it requires them to understand some concepts from the Konveyor domain that could be abstracted away.

It is desired to provide an abstraction layer for these users, hiding away the complexities of custom rules configuration by exposing them as custom migration targets managed by advanced users.

[rromannissen]

Fleshed out in the Custom Migration Targets enhancement.