utl: fix csv parsing for >32 columns, throw for >64 #371

Job	Run time
formatting	46s
macos (macos-x86_64, On)	7m 26s
linux (linux-amd64-release, linux-amd64)	1m 34s
macos (macos-arm64)	7m 7s
linux (clang-tidy)	4m 15s
msvc (Debug)	7m 57s
linux (linux-sanitizer)	2m 40s
openapi-validate	16s
msvc (Release)	7m 2s
linux (linux-debug, valgrind --suppressions=deps/osr/docs/tbb.supp --suppressions=deps/osr/docs/p...	9m 24s
ui	34s
docker	18s
	49m 19s

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