Support custom allocators #1057

Job	Run time
MariaDB 11.4 (ubuntu:focal, Ruby 4.0)	4m 5s
MariaDB 12.1 (debian:bookworm, Ruby 3.3)	3m 48s
MariaDB 10.6 (ubuntu:focal, Ruby 4.0)	4m 10s
MariaDB 11.8 (ubuntu:focal, Ruby 4.0)	4m 14s
MariaDB 12.1 (debian:bookworm, Ruby 4.0)	4m 7s
MariaDB 12.1 (ubuntu:focal, Ruby 4.0)	4m 22s
MariaDB 12.1 (ubuntu:focal, Ruby 4.0)	4m 20s
MariaDB 10.11 (ubuntu:focal, Ruby 4.0)	4m 15s
MariaDB 12.1 (ubuntu:noble, Ruby 4.0)	3m 56s
MariaDB 12.1 (ubuntu:jammy, Ruby 4.0)	3m 56s
MySQL 9.6 (ubuntu:focal, Ruby 4.0, ssl=true)	4m 23s
MySQL 8.0 (ubuntu:focal, Ruby 4.0, ssl=true)	4m 33s
MySQL 8.0 (ubuntu:jammy, Ruby 3.3, ssl=true)	4m 21s
MySQL 8.4 (ubuntu:focal, Ruby 4.0, ssl=true)	4m 33s
MySQL 8.0 (ubuntu:noble, Ruby 4.0, ssl=true)	4m 23s
MySQL 8.4 (ubuntu:noble, Ruby 4.0, ssl=true)	4m 32s
MySQL 9.6 (debian:bookworm, Ruby 4.0, ssl=true)	4m 23s
MySQL 8.4 (debian:bookworm, Ruby 4.0, ssl=true)	4m 45s
MySQL 8.0 (debian:bookworm, Ruby 4.0, ssl=true)	4m 0s
MySQL 8.0 (debian:bookworm, Ruby 3.3, ssl=false)	4m 31s
MySQL 9.6 (ubuntu:noble, Ruby 4.0, ssl=true)	4m 7s
MySQL 9.6 (ubuntu:jammy, Ruby 4.0, ssl=true)	3m 58s
MySQL 8.0 (debian:bookworm, Ruby 3.3, ssl=true)	4m 48s
MySQL 8.0 (ubuntu:jammy, Ruby 4.0, ssl=true)	4m 23s
MySQL 8.4 (ubuntu:jammy, Ruby 4.0, ssl=true)	4m 18s
	1h 47m 11s

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