switch to ms in histogram for date type

[PSeitz]

switch to ms in histogram, by adding a normalization step that converts
to nanoseconds precision when creating the collector.

closes #2028
related to #2026

[codecov-commenter]

Codecov Report

Merging #2045 (ae94bf2) into main (2dfe379) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main    #2045      +/-   ##
==========================================
- Coverage   94.43%   94.43%   -0.01%     
==========================================
  Files         319      319              
  Lines       59633    59706      +73     
==========================================
+ Hits        56313    56381      +68     
- Misses       3320     3325       +5     

Impacted Files	Coverage Δ
src/aggregation/agg_req.rs	94.11% <ø> (ø)
src/aggregation/agg_req_with_accessor.rs	100.00% <ø> (ø)
src/aggregation/bucket/mod.rs	96.15% <ø> (ø)
src/aggregation/intermediate_agg_result.rs	94.84% <ø> (-0.07%)	⬇️
src/aggregation/metric/percentiles.rs	89.48% <ø> (ø)
src/aggregation/mod.rs	91.87% <ø> (ø)
columnar/src/columnar/column_type.rs	72.22% <100.00%> (+0.95%)	⬆️
src/aggregation/bucket/histogram/date_histogram.rs	97.27% <100.00%> (+0.01%)	⬆️
src/aggregation/bucket/histogram/histogram.rs	99.46% <100.00%> (+0.01%)	⬆️
src/aggregation/segment_agg_result.rs	95.68% <100.00%> (ø)

... and 5 files with indirect coverage changes