Iteration reports do not include issues moved from other projects
When we move issues, we copy over some resource events in:
- https://gitlab.com/gitlab-org/gitlab/blob/9bb48c9b87e82324ad36fd6854739fade0c6d045/app/services/issuable/clone/attributes_rewriter.rb#L20-22
- https://gitlab.com/gitlab-org/gitlab/blob/70aec3e4ef6ecd394597d3185dac2bdd6e40296f/ee/app/services/ee/issuable/clone/attributes_rewriter.rb#L13
We should also copy ResourceIterationEvent
since these are the basis for the iteration charts