Fix issue on port directions

[olethanh]

• Port redirect: Only redirect for instance
• Port redirect: Avoid redirecting the same port

Root cause:
The list of rule fetched from ntfable was filtered on the nat table
that didn't contain the redirection so we missed existing redirect

Related ClickUp, GitHub or Jira tickets : ALEPH-551

[codecov]

Codecov Report

Attention: Patch coverage is 58.82353% with 7 lines in your changes missing coverage. Please review.

Project coverage is 64.65%. Comparing base (28a4d09) to head (507dd98).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/models.py	50.00%	2 Missing and 1 partial ⚠️
src/aleph/vm/network/firewall.py	66.66%	3 Missing ⚠️
src/aleph/vm/pool.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #810      +/-   ##
==========================================
+ Coverage   64.63%   64.65%   +0.01%     
==========================================
  Files          84       84              
  Lines        7576     7577       +1     
  Branches      651      651              
==========================================
+ Hits         4897     4899       +2     
+ Misses       2471     2470       -1     
  Partials      208      208              

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