reuse samples, add EstimateColumn

[PSeitz]

estimations can be expensive since the samples span the whole column
and depending on the implementation get_val can not be easily computed
without an index.
EstimateColumn adds a view over the column which limits num_vals
to 100_000.

[codecov-commenter]

Codecov Report

Merging #1551 (ba3215b) into main (dac7da7) will decrease coverage by 0.03%.
The diff coverage is 62.82%.

@@            Coverage Diff             @@
##             main    #1551      +/-   ##
==========================================
- Coverage   93.94%   93.91%   -0.04%     
==========================================
  Files         249      249              
  Lines       46066    46101      +35     
==========================================
+ Hits        43277    43296      +19     
- Misses       2789     2805      +16     

Impacted Files	Coverage Δ
fastfield_codecs/src/serialize.rs	85.08% <5.88%> (-0.40%)	⬇️
fastfield_codecs/src/column.rs	80.52% <59.37%> (-4.29%)	⬇️
fastfield_codecs/src/bitpacked.rs	98.43% <100.00%> (ø)
fastfield_codecs/src/blockwise_linear.rs	99.21% <100.00%> (ø)
fastfield_codecs/src/lib.rs	99.38% <100.00%> (+0.01%)	⬆️
fastfield_codecs/src/line.rs	99.14% <100.00%> (-0.05%)	⬇️
fastfield_codecs/src/linear.rs	98.70% <100.00%> (ø)
src/fastfield/multivalued/mod.rs	97.23% <0.00%> (-1.19%)	⬇️
.../termdict/sstable_termdict/sstable/block_reader.rs	82.14% <0.00%> (+1.78%)	⬆️

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[fulmicoton]

Closing as it was adressed by #1587