custom linter for i18n/label translation keywords does not currently lint a lot of usages of utils.i18n/label

[akatov]

#17610 provided custom linting of the keywords passed to utils.i18n/label (to enforce namespacing them with :t/).

There are still instances where these keywords aren't linted:

• within forms that are marked to be linted as clj-kondo.lint-as/def-catch-all, in particular, within utils.re-frame/defn macros.
• when the keyword isn't passed to the utils.i18n/label directly, but is e.g. inside an if form.

The 2nd case is harder and probably impossible to solve in general during linting and would require run-time checks instead.

[ilmotta]

within forms that are marked to be linted as clj-kondo.lint-as/def-catch-all, in particular, within utils.re-frame/defn macros.

FYI @akatov, recently we officially deprecated the usage of utils.re-frame/defn. For many reasons, one being that code inside it is not linted by clj-kondo. So it's better if we don't invest time on that macro.