Improve data eviction implementation

[SimFG]

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[codecov]

Codecov Report

Merging #221 (010e278) into dev (88bc249) will increase coverage by 0.17%.
The diff coverage is 91.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #221      +/-   ##
==========================================
+ Coverage   92.56%   92.73%   +0.17%     
==========================================
  Files          48       52       +4     
  Lines        1546     1584      +38     
==========================================
+ Hits         1431     1469      +38     
  Misses        115      115              

Impacted Files	Coverage Δ
gptcache/manager/object_data/manager.py	85.71% <50.00%> (ø)
gptcache/manager/eviction/base.py	76.92% <76.92%> (ø)
gptcache/manager/eviction/memory_cache.py	90.90% <90.90%> (ø)
gptcache/manager/data_manager.py	88.52% <92.30%> (-0.28%)	⬇️
gptcache/manager/eviction/__init__.py	100.00% <100.00%> (ø)
gptcache/manager/eviction/manager.py	100.00% <100.00%> (ø)
gptcache/manager/eviction_manager.py	96.55% <100.00%> (ø)
gptcache/manager/scalar_data/base.py	85.45% <100.00%> (+2.64%)	⬆️
gptcache/manager/scalar_data/manager.py	100.00% <100.00%> (ø)
gptcache/manager/scalar_data/sql_storage.py	95.83% <100.00%> (-0.47%)	⬇️
... and 2 more