Fix duplicates of duplicates

[ghost]

Any reports that are marked duplicate of other duplicates should be corrected to be duplicates of the original parent. The extra duplicate links will need to be removed, and any pinned data, and affected versions should be adjusted accordingly.

Originally by @CubeTheThird.

[ghost]

@calebsander said:
I think resolving an issue as a dupe of a dupe can be useful sometimes. If the issue seems unrelated to the first report but it is identical to another issue, the user can read the reasoning on the intermediate ticket as to why it's a duplicate.

[ghost]

@ezfe said:
@calebsander correct, however in theory every ticket should relate to a single behavior, therefor a ticket is either a dupe or not. "Related" would be for, well, related

[ghost]

@calebsander said:
I just think it can make it easier for the user to see how it is a duplicate without the moderators having to explain it again