test(resharding): base resharding scenario state cleanup

[staffik]

A test for cleanup after resharding.
Adds an extra client without a role, that initially tracks the parent shard, then a child shard, and then an unrelated shard.
After a few epochs, only the last tracked shard should reside in State, while currently the test fails because it has entries from the first tracked shard too.

Changes

• Fix a bug in test infra: pass gc_num_epochs_to_keep to the runtime.
• Add tracked_shard_schedule option to resharding testloop, in order to test the cleanup.
• Add the cleanup test itself (ignored for now).

[codecov]

Codecov Report

Attention: Patch coverage is 5.61798% with 84 lines in your changes missing coverage. Please review.

Project coverage is 70.53%. Comparing base (21b5109) to head (aa701ce).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...ntegration-tests/src/test_loop/utils/resharding.rs	0.00%	84 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12678      +/-   ##
==========================================
- Coverage   70.56%   70.53%   -0.04%     
==========================================
  Files         847      847              
  Lines      172735   172823      +88     
  Branches   172735   172823      +88     
==========================================
+ Hits       121897   121898       +1     
- Misses      45737    45824      +87     
  Partials     5101     5101              

Flag	Coverage Δ
backward-compatibility	0.16% <0.00%> (ø)
db-migration	0.16% <0.00%> (?)
genesis-check	1.36% <0.00%> (-0.01%)	⬇️
linux	69.22% <5.61%> (-0.03%)	⬇️
linux-nightly	70.11% <5.61%> (-0.06%)	⬇️
pytests	1.66% <0.00%> (-0.01%)	⬇️
sanity-checks	1.47% <0.00%> (-0.01%)	⬇️
unittests	70.36% <5.61%> (-0.04%)	⬇️
upgradability	0.20% <0.00%> (ø)

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[Trisfald]

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