1658 Fix totalMemory calculation used for garbage collection

[kladkogex]

Total memory calculation in garbage collection loop should not take into account
blockHashes since they are treated separately

To Reproduce
Set cache size to a small value (2000 bytes)
Run the smart contract tests in tests/historic_state

SKALED will hang forever in garbage collection while loop

[github-actions]

SUGGESTIONS BEFORE MERGE:

1. Build custom container here: https://github.com/skalenetwork/skaled/actions?query=workflow%3A%22Custom+Docker+and+Binary%22
2. Test it here: https://github.com/skalenetwork/skale-ci-integration_tests/actions?query=workflow%3A%22Skaled+Nightly+Tests%22
3. Edit VERSION file appropriately to your changes!
   See https://skalelabs.atlassian.net/wiki/spaces/SKALE/pages/2444951553/Branching+instructions

[codecov]

Codecov Report

Merging #1659 (23702e5) into develop (98f342d) will increase coverage by 0.06%.
Report is 13 commits behind head on develop.
The diff coverage is 0.00%.

❗ Current head 23702e5 differs from pull request most recent head f4ff5ab. Consider uploading reports for the commit f4ff5ab to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1659      +/-   ##
===========================================
+ Coverage    44.92%   44.98%   +0.06%     
===========================================
  Files          340      340              
  Lines        51248    51248              
===========================================
+ Hits         23022    23053      +31     
+ Misses       28226    28195      -31