Use swift-issue-reporting instead of xctest-dynamic-overlay

[michalsrutek]

As https://github.com/pointfreeco/xctest-dynamic-overlay has been renamed to https://github.com/pointfreeco/swift-issue-reporting

[stephencelis]

@michalsrutek Unfortunately this work needs to be done on the IssueReporting side to not break things for others. SPM unfortunately does not have good support redirects that rename the package. It works for simple things, but not for more complex dependency trees, and so we're forced to split things out to 2 packages, which in itself has a lot of opportunity to break things for existing users, so we're taking things slow and proceeding with caution when we're more certain we have everything accounted for.

See: pointfreeco/swift-issue-reporting#101

[stephencelis]

Going to close this for now, but appreciate the time!