Follows-up Ieaf04e0c289646dd5 which changed internal references to
bool(true) for 'debug' to the integer DEBUG_ constants, and introduced
a new debug=2 parameter.
In the refactor, I missed the setDebug() calls for
DerivativeResourceLoaderContext, which were still passing a boolean,
but more importantly were effectively passing debug=1 even if the
pageview carried debug=2. This isn't a problem yet in production since
debug=2 is currently identical in behaviour to debug=1.
The impact of this issue is mainly noticed through secondary CSS
requests. The URLs for primary stylesheets, and JS modules was already
forwarding the current "debug" version.
Test Plan:
* Open Main_Page?action=edit&debug=2
* Before this patch, e.g. on mediawiki.org today, secondary
stylesheet requests (part of a JS module) have debug=1.
For example "modules=jquery.makeCollapsible.styles&only=styles".
* After this, everything has debug=2 when the page view has debug=2.
Bug: T85805
Change-Id: Ia8fba4e30397bc5890033f13417b6739b0f83c38
6d14529c69