QueryResultTypeWalker: support pdo_pgsql float fetches on PHP 8.4 #124

Job	Run time
Platform test (7.4)	3m 29s
Platform test (8.0)	2m 58s
Platform test (8.1)	3m 12s
Platform test (8.2)	3m 29s
Platform test (8.3)	3m 7s
Platform test (8.4)	3m 36s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 49s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 9s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 50s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 55s
	31m 34s

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