feat(pytest): reenable store validator

[bowenwang1996]

Re-enable store validator tests that were disabled in #11022. It works by first sending a signal to GC actor to stop garbage collection, then run the store validator, and send a signal to re-enable gc afterwards.

Nayduck run https://nayduck.nearone.org/#/run/58

[codecov]

Codecov Report

Attention: Patch coverage is 48.78049% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 71.09%. Comparing base (a1a01b4) to head (4fe2638).
Report is 1 commits behind head on master.

Files	Patch %	Lines
chain/jsonrpc/src/lib.rs	20.00%	11 Missing and 1 partial ⚠️
chain/client/src/gc_actor.rs	43.75%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11127      +/-   ##
==========================================
- Coverage   71.10%   71.09%   -0.01%     
==========================================
  Files         772      772              
  Lines      153724   153759      +35     
  Branches   153724   153759      +35     
==========================================
+ Hits       109298   109311      +13     
- Misses      39976    39996      +20     
- Partials     4450     4452       +2     

Flag	Coverage Δ
backward-compatibility	0.24% <0.00%> (-0.01%)	⬇️
db-migration	0.24% <0.00%> (-0.01%)	⬇️
genesis-check	1.43% <0.00%> (-0.01%)	⬇️
integration-tests	36.90% <43.90%> (+0.02%)	⬆️
linux	69.52% <100.00%> (+0.01%)	⬆️
linux-nightly	70.55% <48.78%> (-0.06%)	⬇️
macos	52.59% <100.00%> (-1.66%)	⬇️
pytests	1.66% <0.00%> (-0.01%)	⬇️
sanity-checks	1.44% <0.00%> (-0.01%)	⬇️
unittests	66.73% <48.78%> (-0.03%)	⬇️
upgradability	0.29% <0.00%> (-0.01%)	⬇️

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[Longarithm]

It looks to me that adv_check_store was enabled already, we are just making it correct, and then I don't understand how the previous disabling of this check worked.
Anyway, approving to unblock

[bowenwang1996]

@Longarithm good catch! For some reason I forgot to do the actual change that re-enables store validator in pytests. It is now done in 4fe2638. Associated nayduck run to show no regression: https://nayduck.nearone.org/#/run/61