Support custom allocators #1073

Job	Run time
MariaDB 12.1 (ubuntu:noble, Ruby 4.0.2)	4m 42s
MariaDB 12.1 (ubuntu:focal, Ruby 4.0.2)	4m 30s
MariaDB 10.6 (ubuntu:focal, Ruby 4.0.2)	4m 52s
MariaDB 12.1 (debian:bookworm, Ruby 4.0.2)	4m 51s
MariaDB 11.8 (ubuntu:focal, Ruby 4.0.2)	5m 1s
MySQL 8.4 (ubuntu:jammy, Ruby 4.0.2, ssl=true)	4m 58s
MySQL 8.0 (debian:bookworm, Ruby 4.0.2, ssl=true)	5m 17s
MariaDB 10.11 (ubuntu:focal, Ruby 4.0.2)	4m 47s
MySQL 8.0 (ubuntu:noble, Ruby 4.0.2, ssl=true)	4m 54s
MySQL 8.0 (debian:bookworm, Ruby 3.3.10, ssl=true)	5m 7s
MariaDB 12.1 (ubuntu:focal, Ruby 4.0.2)	4m 54s
MySQL 9.6 (ubuntu:noble, Ruby 4.0.2, ssl=true)	5m 1s
MySQL 8.0 (debian:bookworm, Ruby 3.3.10, ssl=false)	5m 9s
MariaDB 11.4 (ubuntu:focal, Ruby 4.0.2)	4m 52s
MySQL 8.0 (ubuntu:jammy, Ruby 4.0.2, ssl=true)	4m 59s
Ruby Head Debug	5m 51s
MySQL 8.0 (ubuntu:focal, Ruby 4.0.2, ssl=true)	5m 19s
MySQL 8.4 (ubuntu:noble, Ruby 4.0.2, ssl=true)	5m 8s
MySQL 9.6 (ubuntu:jammy, Ruby 4.0.2, ssl=true)	4m 54s
MySQL 8.0 (ubuntu:jammy, Ruby 3.3.10, ssl=true)	4m 58s
MySQL 9.6 (ubuntu:focal, Ruby 4.0.2, ssl=true)	5m 13s
MariaDB 12.1 (ubuntu:jammy, Ruby 4.0.2)	4m 47s
MySQL 8.4 (ubuntu:focal, Ruby 4.0.2, ssl=true)	5m 19s
MariaDB 12.1 (debian:bookworm, Ruby 3.3.10)	4m 51s
MySQL 9.6 (debian:bookworm, Ruby 4.0.2, ssl=true)	5m 14s
MySQL 8.4 (debian:bookworm, Ruby 4.0.2, ssl=true)	5m 44s
	2h 11m 12s

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