Public bug reported:

Request
-------
We want Subiquity to switch to the new probert rtnetlink implementation, which 
is written in pure Python instead of C. Earlier, we already switched to the new 
nl80211 implementation.

Why Needed
----------
In the past few cycles in Subiquity, there have been reports of python crashes 
(e.g., Segmentation fault) caused by poor implementation of probert network 
modules written in C.
To clear the possibility of memory safety vulnerabilities, we want to stop 
relying on memory unsafe code in Subiquity, ASAP.

Having this new implementation in 25.10 will give us more room for
addressing any potential bugs in the new implementation before the
change gets more wildely rolled  with the coming LTS.

What Changed
------------
* The new implementation is based on pyroute2 instead of libnl. When it comes 
to its behavior, it is designed to be as close in behavior as the old 
implementation in C.

Code to be merged
-----------------
* https://github.com/canonical/probert/pull/160

** Affects: probert
     Importance: Undecided
         Status: New

** Affects: subiquity
     Importance: Undecided
         Status: New

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: subiquity (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: probert
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2121429

Title:
  [FFe] New probert rtnetlink implementation

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