No-Merge: Test for GH-21864#21867

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SakiTakamachi wants to merge 1 commit intophp:PHP-8.5from

SakiTakamachi:pdo_fetch_use_default_85_test

Commits on Apr 24, 2026

When using `FETCH_DEFAULT`, instead of setting the mode to a default value, it was modified so that the default value is not overridden.
SakiTakamachi
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