As a legacy from the old Health Check plugin, the constant `WP_LOCAL_DEV` was included in the debug data under the "WordPress Constants" section. This was incorrect, and has never been a constant used by core.
Instead, that field is now replaced by `WP_ENVIRONMENT_TYPE`, which was introduced with WordPress 5.5, and is a much more appropriate value to provide in a debug scenario.
Props johnbillion, bgoewert, sabbirshouvo.
Fixes#54340.
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