I18N: Respect the passed `text_direction` argument in `wp_die()`.

Previously, the passed value was only used as a fallback if `get_language_attributes()` is not yet available.

Props apedog.
Fixes #49060.
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git-svn-id: https://core.svn.wordpress.org/trunk@48369 1a063a9b-81f0-0310-95a4-ce76da25c4cd