The `setup-node` action contains built-in support for caching [1], so
this commit makes sure we use it for all Node.js-based workflows to
reduce workflow execution time.
Note that, contrary what one might expect [2], the `node_modules`
directory is deliberately not cached because it can conflict with
differing Node.js versions and because it's not useful in combination
with `npm ci` usage which wipes the `node_modules` folder
unconditionally. Therefore, the action instead caches the global `npm`
cache directory instead which does not suffer from these problems and
still provides a speed-up at installation time.
[1] https://github.com/actions/setup-node?tab=readme-ov-file#caching-global-packages-data
[2] https://github.com/actions/setup-node/issues/416
[3] https://github.com/actions/cache/issues/67
This reverts commit d618a2bc7ebe550cfcef31df8ddd0c8a12cf6bf1.
Unfortunately it did not fix the hanging actions for the locale update
job; fixing the issue is tracked in #20813.
