feat(edssser): introduce EDS Store Stresser and cel-shed utility

[Wondertan]

We need a way to stress test EDS Store now and long-term. This PR provides a tool that can be used to run such tests and measure, debug, explore, and fine-tune various aspects of the EDS storing sub-system in isolation.

The main goal is to investigate #2480 and ensure the future fix/solution is

[codecov-commenter]

Codecov Report

Merging #2482 (953b5b4) into main (d0e271e) will decrease coverage by 0.70%.
Report is 41 commits behind head on main.
The diff coverage is 45.71%.

@@            Coverage Diff             @@
##             main    #2482      +/-   ##
==========================================
- Coverage   52.62%   51.92%   -0.70%     
==========================================
  Files         156      156              
  Lines       10007     9989      -18     
==========================================
- Hits         5266     5187      -79     
- Misses       4275     4346      +71     
+ Partials      466      456      -10     

Files Changed	Coverage Δ
share/eds/store.go	57.28% <0.00%> (-3.95%)	⬇️
core/testing.go	87.23% <100.00%> (-4.63%)	⬇️
nodebuilder/init.go	47.46% <100.00%> (+0.67%)	⬆️

... and 7 files with indirect coverage changes

[distractedm1nd]

This is really great, my only very optional nit would be naming (not so sure about EDSsser, don't see whats wrong with EDSStoreStresser)

[distractedm1nd]

let's of course merge vlad's improvement PR into this branch first

[Wondertan]

@distractedm1nd, I just like saying EDSsssssser. It's first of a all a name, not abriviation

[Wondertan]

Rebased on main