Bitpack VAR_LIST offset data

[benjaminwinger]

Functionally identical to UINT64, (for the offsets at least), which makes this very simple

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (da22d9e) 90.21% compared to head (8f382a9) 90.24%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2084      +/-   ##
==========================================
+ Coverage   90.21%   90.24%   +0.02%     
==========================================
  Files         966      970       +4     
  Lines       35019    35077      +58     
==========================================
+ Hits        31593    31655      +62     
+ Misses       3426     3422       -4     

Files	Coverage Δ
src/storage/store/column_chunk.cpp	77.97% <100.00%> (ø)
src/storage/store/compression.cpp	78.35% <75.00%> (+1.29%)	⬆️

... and 31 files with indirect coverage changes

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