[Feedback] Conan Essentials - Custom Settings

Since we have a great article on custom settings for sanitizers in Conan documentation - I believe it'd be great to reuse it for training or at least mention it to give listeners more reference points for the feature.

Start by locating the Conan documentation article on custom settings for sanitizers and the Conan Essentials training material. Done means the article is reused in the training or a clear reference to it is added for listeners.

Written by the indexing model from the issue text.