Use cakephp/database for postgres schema reflection #820

Job	Run time
Windows - PHP 8.1 & SQL Server	3m 16s
testsuite-linux (8.1, mariadb)	1m 33s
testsuite-linux (8.1, mysql)	1m 10s
testsuite-linux (8.1, pgsql)	52s
testsuite-linux (8.1, sqlite)	42s
testsuite-linux (8.2, mariadb)	1m 32s
testsuite-linux (8.2, mysql)	56s
testsuite-linux (8.2, pgsql)	1m 0s
cs-stan / Coding Standard & Static Analysis	48s
testsuite-linux (8.2, sqlite)	53s
testsuite-linux (8.3, mariadb)	1m 36s
testsuite-linux (8.3, mysql)	57s
testsuite-linux (8.3, pgsql)	1m 3s
testsuite-linux (8.3, sqlite)	46s
testsuite-linux (8.4, mariadb)	1m 46s
testsuite-linux (8.4, mysql)	1m 3s
testsuite-linux (8.4, pgsql)	52s
testsuite-linux (8.4, sqlite)	44s
testsuite-linux (8.1, sqlite, prefer-lowest)	56s
testsuite-linux (8.1, sqlite, dev-5.next as 5.1.0)	58s
	23m 23s

Provide feedback