Using `updateCacheExpiry()` in this way appears to be established
with examples of other use in WMF production such as:
- CategortyTree extension:
custom cache expiry for pages with `<categorytree>`.
- RSS extension:
custom cache expiry for pages with `<rss>`.
- intersection extension:
custom cache expiry for pages with `<DynamicPageList>`.
- Math extension:
custom cache expiry if `<math>` failed.
- Wikibase extension, Flow extension:
no caching for certain namespaces or content types.
- Graph extension, Kartographer extension:
via onParserAfterParse hook, no caching if on preview.
Bug: T280605
Change-Id: Iea41ab8599ffae4622c97d682258b1b64eaf9ba2
