Fixes #1826 - Add a cross-network dynamic address capability

[ted-ross]

Fixes #1826 - Added a test for the cross-network feature Fixes #1826 - Fixed asan issue
Fixes #1826 - Added support for edge-style cross-net dynamic addresses. Fixes #1826 - Make the test less resource-intensive for the CI Fixes #1826 - Introduced the inter-network role and inter-network-specific statistics Fixes #1826 - Renamed entity managedRouter => network; Added a doc file describing the feature. Fixes #1826 - Removed the backward-compatibility features to simplify the patch.
This will need to be carried separately until the next major release.
For inter-network deliveries, strip only the origin and trace annotations.

[ted-ross]

This PR will not be merged until v4.0.0. It is here for review and testing.

[github-advanced-security]

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[codecov]

Codecov Report

❌ Patch coverage is 70.30303% with 49 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.7%. Comparing base (60cd6ec) to head (479368f).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1835     +/-   ##
=======================================
- Coverage   70.5%   65.7%   -4.9%     
=======================================
  Files        209     204      -5     
  Lines      47838   47233    -605     
  Branches    5156    5282    +126     
=======================================
- Hits       33765   31043   -2722     
- Misses     11608   14116   +2508     
+ Partials    2465    2074    -391     

Flag	Coverage Δ
pysystemtests	77.0% <40.0%> (+0.7%)	⬆️
systemtests	59.8% <71.2%> (-7.6%)	⬇️

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Components	Coverage Δ
unittests	65.7% <72.1%> (-4.9%)	⬇️
systemtests	65.7% <72.1%> (-4.9%)	⬇️

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