Implement Clone for CompressError and DecompressError

[mkrasnitski]

When making my own error types, one of my variants wraps a flate2::DecompressError, and that prevents me from deriving Clone on my error type without creating a mirror implementation and transforming between the flate2 type and my copy of it. These two error types are cheap to clone and Status already derives Clone, too.

I didn't add a Copy derive because the ErrorMessage struct might be changed to contain a string in the future, which would break the Copy implementation.

[mkrasnitski]

Seems like the cloudflare_zlib feature is broken unrelated to my changes.

[Byron]

Thanks a lot, I'd also think that doing this should only be helpful downstream, and not cause any complications.

CI break spontaneously not too long ago, and it's still unclear what's even causing this. Time to reproduce this locally I presume, but no need to block this PR on it.