Always pass $locale to load_textdomain() if we know the locale

[ocean90]

In [53874] the optional $locale parameter was added to load_textdomain(). While most load_textdomain() calls in core were were updated, some were missed:

• ​wp_load_translations_early()
• ​wp_timezone_choice()
• ​WP_REST_Site_Health_Controller::load_admin_textdomain()
• ​wp-admin/includes/admin.php

Trac ticket: https://core.trac.wordpress.org/ticket/57060

[desrosj]

Looks good. Feel free to commit and backport.

[ocean90]

In 54795:

I18N : Always pass $locale to load_textdomain().

In [53874] the optional $locale parameter was added to load_textdomain(). While most load_textdomain() calls in core were were updated, some were missed. Passing the original locale avoids the need to call determine_locale() by load_textdomain() which is used as a fallback.

Props ocean90, swissspidy, desrosj.
Fixes #57060.

[ocean90]

In 54796:

I18N: Revert [54795] from the 6.1 branch.

This will be added again once committed to trunk first.

See #57060.

[ocean90]

In 54797:

I18N: Always pass $locale to load_textdomain().

In [53874] the optional $locale parameter was added to load_textdomain(). While most load_textdomain() calls in core were were updated, some were missed. Passing the original locale avoids the need to call determine_locale() by load_textdomain() which is used as a fallback.

Props ocean90, swissspidy, desrosj.
See #57060.

[ocean90]

In 54798:

I18N: Always pass $locale to load_textdomain().

In [53874] the optional $locale parameter was added to load_textdomain(). While most load_textdomain() calls in core were were updated, some were missed. Passing the original locale avoids the need to call determine_locale() by load_textdomain() which is used as a fallback.

Props ocean90, swissspidy, desrosj.
Merges [54797] to the 6.1 branch.
Fixes #57060.