Problem: error Too many open files

[olethanh]

Jira ticket: ALEPH-298

some CRN failed on any action with error OSError: [Errno 24] Too many open files:

Solution:
Properly close stream to journald when the VM is stopped

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 62.59%. Comparing base (662c0c0) to head (a19bd6b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/hypervisors/firecracker/microvm.py	73.33%	4 Missing ⚠️
src/aleph/vm/hypervisors/qemu/qemuvm.py	55.55%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #720   +/-   ##
=======================================
  Coverage   62.58%   62.59%           
=======================================
  Files          69       69           
  Lines        6140     6152   +12     
  Branches      496      500    +4     
=======================================
+ Hits         3843     3851    +8     
- Misses       2147     2151    +4     
  Partials      150      150           

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