[Fixes #12728] 3dtiles download does not keep the folder structure

[mattiagiupponi]

Upgrade of the library zipstream-ng is required since they add the functionality we need as described in the changelog:

https://github.com/pR0Ps/zipstream-ng/blob/v1.8.0/CHANGELOG.md

Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.01%. Comparing base (17c4707) to head (60b8dc0).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12729      +/-   ##
==========================================
- Coverage   67.01%   67.01%   -0.01%     
==========================================
  Files         952      952              
  Lines       56905    56903       -2     
  Branches     6723     6722       -1     
==========================================
- Hits        38137    38133       -4     
- Misses      17156    17159       +3     
+ Partials     1612     1611       -1     

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