Update Ad Control to AdControl in static admin menu data

[getdave]

@getdave
Sorry for bringing that up, but I've noticed that the actual menu entry for 'AdControl' doesn't have a space in it and is also not translated (in wordads-userdash), while the placeholder data has 'Ad Control' in it, which our translators are now translating. The effect of this would be that the users who see the fallback data would see something like 'Gestión de anuncios' for Spanish and then 'AdControl' when the actual menu would be loaded.
It's possible to switch to using 'AdControl' in the fallback data and not translate it, in case that it's a product name and it'd appear the same in all the languages. Or translate 'AdControl' both in the placeholder data and the actual menu entry and have some guidelines on how it should be translated so that it'd be consistent across all languages.

I discussed this with @dlind1 and we agreed to:

• Match static data to canonical reference (see wordads-userdash/wordads-info.php#39) for the AdControl menu item - change Ad Control to be AdControl within the static data.
• We agreed to retain the existing translate() wrapper around AdControl in the static data even though the canonical version in PHP is not yet translated.

Originally posted by @getdave in #45836 (comment)