Insert into the hash index builder one chunk at a time

[benjaminwinger]

First part of #2938.

There is a small performance improvement, though it's obscured somewhat by the amount of variance I was seeing between runs. It was roughly 100ms improvement (copying a table with just 60 million integer primary keys, went from ~2.3 to ~2.2 seconds).

This replaces the one at a time append in HashIndexBuilder with an append function that takes a StaticVector (since that's what's used in the IndexBuilder's queues). Resizing the index and calculating the hashes is done on the 1024 values in the StaticVector all at once, before each value is inserted one by one.
I also removed the second type from the HashIndexBuilder since the StaticVector stores a std::string and it makes more sense to just hardcode places which take a std::string/std::string_view using std::conditional than to add more template parameters (and there is only really one variable parameter anyway).

[codecov]

Codecov Report

Attention: Patch coverage is 96.29630% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 93.28%. Comparing base (0c26056) to head (af50489).

Files	Patch %	Lines
src/include/storage/index/hash_index_builder.h	85.71%	1 Missing ⚠️
...rc/processor/operator/persistent/index_builder.cpp	90.90%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2997   +/-   ##
=======================================
  Coverage   93.28%   93.28%           
=======================================
  Files        1128     1128           
  Lines       42947    42949    +2     
=======================================
+ Hits        40062    40067    +5     
+ Misses       2885     2882    -3     

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