Download multiple artifacts at once (in parallel)

[skjnldsv]

Describe the enhancement When downloading all artifacts, it is using a while loop and an await for each artifact. To speed things up it would be nice to add a download queue and download X items at once

Code Snippet https://github.com/actions/toolkit/blob/457303960f03375db6f033e214b9f90d79c3fe5c/packages/artifact/src/internal/artifact-client.ts#L240-L251

[nmichlo]

This would be great