4.x: Fix Streamable.fromStream not closing the Stream

[akarnokd]

Forgot to close the Stream once the operator was done with it, like all the other variations.

We got a report for it as a security vulnerability, hammer and nail, hence the quick fix.

The report was some kind of tool or AI. By https://github.com/August829

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.62%. Comparing base (3895db1) to head (28fdf5a).
⚠️ Report is 1 commits behind head on 4.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                4.x    #8267      +/-   ##
============================================
+ Coverage     98.60%   98.62%   +0.01%     
- Complexity     7145     7147       +2     
============================================
  Files           824      824              
  Lines         50768    50782      +14     
  Branches       6905     6906       +1     
============================================
+ Hits          50061    50082      +21     
+ Misses          482      478       -4     
+ Partials        225      222       -3     

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