OOM fixes

[iulianpascalau]

• removed bloom filter implementation & usage
• added cache.Clear call in unit storer close function

[codecov]

Codecov Report

Merging #3700 (0d6b45a) into development (40ead07) will increase coverage by 0.03%.
The diff coverage is 63.23%.

@@               Coverage Diff               @@
##           development    #3700      +/-   ##
===============================================
+ Coverage        73.76%   73.80%   +0.03%     
===============================================
  Files              588      589       +1     
  Lines            76091    76156      +65     
===============================================
+ Hits             56129    56207      +78     
+ Misses           15525    15504      -21     
- Partials          4437     4445       +8     

Impacted Files	Coverage Δ
process/smartContract/hooks/blockChainHook.go	58.68% <ø> (+0.17%)	⬆️
storage/factory/common.go	100.00% <ø> (ø)
storage/factory/pruningStorerFactory.go	0.00% <0.00%> (ø)
storage/pruning/fullHistoryTriePruningStorer.go	0.00% <0.00%> (ø)
trie/factory/trieCreator.go	56.19% <ø> (-0.36%)	⬇️
trie/trieStorageManagerWithoutPruning.go	75.75% <33.33%> (-10.45%)	⬇️
storage/pruning/fullHistoryPruningStorer.go	75.43% <50.00%> (+0.86%)	⬆️
trie/trieStorageManager.go	65.44% <60.93%> (+15.57%)	⬆️
consensus/spos/bls/subroundBlock.go	70.69% <64.70%> (+0.15%)	⬆️
storage/pruning/triePruningStorer.go	67.00% <67.00%> (ø)
... and 16 more

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