fix(unreal): Allow to parse with limit [INGEST-565]

[jan-auer]

To avoid unbounded allocation on bad input data, this PR introduces a new API
Unreal4Crash::parse_with_limit that allows specifying a maximum allocation
size.

[jan-auer]

As an alertnative to the +1 hack, I can offer this:

        let mut decompressed = Vec::new();
        let decoder = &mut ZlibDecoder::new(slice);

        decoder
            .take(limit as u64)
            .read_to_end(&mut decompressed)
            .map_err(|e| Unreal4Error::new(Unreal4ErrorKind::BadCompression, e))?;

        if !matches!(decoder.read(&mut [0; 1]), Ok(0)) {
            return Err(Unreal4ErrorKind::TooLarge.into());
        }

[Swatinem]

that might be a good alternative, yes, as it makes the limit really explicit.

[loewenheim]

Wouldn't the current code prevent you from using u64::MAX as the limit? Not that one byte more or less is likely to make a difference, but still, I think it's kind of surprising behavior.

[jan-auer]

Correct, that's also why the default limit is set to usize::MAX - 1 in the parse method above.

Going to update this with code from the comment and add a test, then.

[Swatinem]

that might be a good alternative, yes, as it makes the limit really explicit.