API to delete rules from EACL tables and filters

[roman-khimov]

Is your feature request related to a problem? Please describe.

I'm always frustrated when people can't manage EACL the way they want to. They can add rules, but can't delete them.
https://pkg.go.dev/github.com/nspcc-dev/[email protected]/eacl#Table

Describe the solution you'd like

Add APIs to delete rules or filters, they can be convenient in some cases (get EACL/modify/update).

Describe alternatives you've considered

Make it an open structure and manage items in a slice. So convenient... But doesn't fit current model, unfortunately.