[editorial] Drop aliases from 3108 and add a wildcard redirect rule

_Originally posted by @chalin in https://github.com/open-telemetry/semantic-conventions/pull/3108#discussion_r2566550006_

> I suggest that we drop this and every other `aliases` entry that was _added_ via this PR (#3108), and replace it by a single wildcard redirect rule in this README.md file. I'll create a separate issue to track this.



/cc @vitorvasc