[refactor] Move garbage collection related code into a separate file

[shreyan-gupta]

Trying to push all things GC into a separate file.

This is part of the efforts highlighted in issue #10275

[codecov]

Codecov Report

Attention: 129 lines in your changes are missing coverage. Please review.

Comparison is base (38efea2) 71.90% compared to head (11f0574) 71.91%.
Report is 6 commits behind head on master.

Files	Patch %	Lines
chain/chain/src/garbage_collection.rs	81.49%	54 Missing and 72 partials ⚠️
chain/chain/src/store.rs	50.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #10361    +/-   ##
========================================
  Coverage   71.90%   71.91%            
========================================
  Files         716      717     +1     
  Lines      143750   143542   -208     
  Branches   143750   143542   -208     
========================================
- Hits       103368   103222   -146     
+ Misses      35632    35570    -62     
  Partials     4750     4750            

Flag	Coverage Δ
backward-compatibility	0.08% <0.00%> (-0.01%)	⬇️
db-migration	0.08% <0.00%> (-0.01%)	⬇️
genesis-check	1.25% <0.00%> (-0.01%)	⬇️
integration-tests	36.48% <77.32%> (-0.02%)	⬇️
linux	71.47% <82.05%> (+0.01%)	⬆️
linux-nightly	71.50% <82.05%> (+0.02%)	⬆️
macos	53.68% <53.40%> (-0.03%)	⬇️
pytests	1.48% <0.00%> (-0.01%)	⬇️
sanity-checks	1.28% <0.00%> (-0.01%)	⬇️
unittests	68.17% <53.40%> (-0.01%)	⬇️
upgradability	0.13% <0.00%> (-0.01%)	⬇️

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[akhi3030]

LGTM! While you're at it, maybe you can move the GC tests into yet another file maybe.

[pugachAG]

LGTM and thanks for taking time to do this!
nit: could you please mention #10275 in the description

[shreyan-gupta]

LGTM! While you're at it, maybe you can move the GC tests into yet another file maybe.

Thanks Akhi! After your comment, I realized we already had a file tests/gc.rs for garbage collection related tests. I shifted all current gc related test from store.rs to that file!