mgr/dashboard: Update npm packages

mgr/dashboard: Update npm packages

Angular 10.1 includes extraction of TS translations,
so @locl/cli is no longer needed.

Updating Angular automatically removed the usage of base tsconfig.

Downgraded css-loader to be able to use css modules.

angular-tree-component has been deprecated and
replaced by @circlon/angular-tree-component

Fixes: https://tracker.ceph.com/issues/47289
Signed-off-by: Tiago Melo <tmelo@suse.com>