Snapshots in .dart_tool/pub/bin don't get cleaned up and use a lot of space #61089
Description
I'm using the dev version of Dart and have a project I've been working on every now and then and was surprised to discover that the .dart_tool/pub/bin folder uses more than 1GB of space.
Every time the Dart SDK is updated, a new snapshot of the tools used (e.g. build_runner, test, melos) by the project is created, for example some of the latest few snapshots of build_runner:
It looks like old versions don't get cleaned up and the used space keeps increasing. I've manually deleted them by now, but I think old/other versions should automatically get cleaned up when a new snapshot is being created.