EZP-22152: Add templates to the web debug toolbar

*BEFORE MERGING*, revert https://github.com/ezsystems/ezpublish-community/commit/96b20f26b2fbf4c0a9d592a152e5e8a04fd49338.

ezpublish-community changes for http://jira.ez.no/browse/EZP-22152 (https://github.com/ezsystems/ezpublish-kernel/pull/695) .

Adds the newly introduced `EzPublishDebugBundle` to the list of loaded bundles in dev env.