Add configuration for @typescript-eslint/no-unused-vars.
Review Request #13271 — Created Sept. 12, 2023 and submitted
When running on TypeScript files, the basic eslint no-unused-vars plugin
is replaced by a TS version, which didn't have any configuration. This
was causing errors on things like unused function parameters, which we
don't want (we often declare function signatures in parent classes which
are implemented in child classes).
This change adds the necessary configuration for this to work.
Saw that I no longer got errors about unused function parameters when
working with TypeScript files.