Use hdf5-metno fork and netcdf-sys

[magnusuMET]

• I agree to follow the project's code of conduct.
• I added an entry to CHANGES.md if knowledge of this change could be valuable to users.

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• Use the netcdf-sys crate to automatically link the correct netcdf-c
• Use the more updated fork of hdf5-rust, as the original crate has not had a release for quite some time Fork of repository aldanor/hdf5-rust#295

[lnicola]

r? @weiznich

[weiznich]

Looks fine for me 👍

(Seems like I managed to screw up the merge of GiGainfosystems#1, I expected that to be included in #517)

[lnicola]

Thanks, this does clean up the build script a little!