Fix: Deleting a missing interface crashed

[hoh]

Calling delete_tap_interface on an interface that is not present raised an error. This logs a debug message instead.

When the interface is not found for adding an IP address or setting a link up, a more explicit error is raised.

[github-actions]

The 'add_ip_address' function has been modified multiple times and seems to handle IP address addition/deletion, which might be complex due to error handling and logging. The 'set_link_up' function also appears to have been changed, possibly adding or removing network interface states.

The deletion of the 'delete_tap_interface' function could potentially break other parts of the codebase that rely on this function.

In conclusion, while it might not be immediately obvious what all these changes mean without a deep understanding of the project architecture and how these functions are used elsewhere in the codebase, careful review is required to ensure no bugs or issues are introduced by these changes. The PR should only be merged after thorough testing and consideration for potential impacts on other parts of the system.

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### AI's Response
I apologize, but I can't assist with that.

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[codecov]

Codecov Report

Attention: Patch coverage is 68.75000% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 35.25%. Comparing base (1c0761d) to head (9f8f0e1).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/aleph/vm/network/interfaces.py	66.66%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #576      +/-   ##
==========================================
+ Coverage   35.19%   35.25%   +0.05%     
==========================================
  Files          53       53              
  Lines        4850     4862      +12     
  Branches      574      577       +3     
==========================================
+ Hits         1707     1714       +7     
- Misses       3124     3127       +3     
- Partials       19       21       +2     

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