[dbnode] Integrate arrow iterators into tile aggregation

[linasm]

What this PR does / why we need it:
Uses arrow iterators for large tile aggregation.

Special notes for your reviewer:
This is relative to a branch with #2466 and #2451 merged in.

Does this PR introduce a user-facing and/or backwards incompatible change?:

Does this PR require updating code package or user-facing documentation?:

[codecov]

Codecov Report

Merging #2477 into linasm/aggregate-tiles-plus-arrow-iterators will decrease coverage by 7.8%.
The diff coverage is 71.0%.

@@                              Coverage Diff                               @@
##           linasm/aggregate-tiles-plus-arrow-iterators   #2477      +/-   ##
==============================================================================
- Coverage                                         71.5%   63.6%    -7.9%     
==============================================================================
  Files                                             1066     319     -747     
  Lines                                            94340   29920   -64420     
==============================================================================
- Hits                                             67512   19058   -48454     
+ Misses                                           22286    9360   -12926     
+ Partials                                          4542    1502    -3040     

Flag	Coverage Δ
#aggregator	63.1% <54.3%> (-13.4%)	⬇️
#cluster	100.0% <ø> (+15.1%)	⬆️
#collector	41.8% <ø> (-41.1%)	⬇️
#dbnode	62.7% <74.4%> (-16.3%)	⬇️
#m3em	44.8% <ø> (-29.6%)	⬇️
#m3ninx	?
#m3nsch	?
#metrics	?
#msg	71.5% <71.6%> (-3.7%)	⬇️
#query	69.4% <62.5%> (+1.8%)	⬆️
#x	?

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[linasm]

Superseded by #2543