Fix PHP 8.5 deprecations#553

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jnoordsij wants to merge 3 commits intosymfony:1.xfrom

jnoordsij:fix-8.5-deprecations

Commits on Nov 12, 2025

Disable calls to (deprecated) setAccessible on versions it is no-op
jnoordsij
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Replace deprecated 'null' as array-key with empty string in tests
jnoordsij
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Commits on Nov 13, 2025

Drop duplicated empty string key from Php73Test arrays
jnoordsij
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