QueryResultTypeWalker: support pdo_pgsql float fetches on PHP 8.4 #125

Job	Run time
Platform test (7.4)	3m 29s
Platform test (8.0)	3m 28s
Platform test (8.1)	3m 17s
Platform test (8.2)	3m 15s
Platform test (8.3)	3m 6s
Platform test (8.4)	3m 24s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 26s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 23s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 51s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 44s
	32m 23s

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