Auto merge of #128722 - tgross35:new-resolver-root, r=Mark-Simulacrum

Switch to using the v2 resolver in most workspaces

Pinning the resolver to v1 was done in 5abff3753a7c ("Explicit set workspace.resolver ...") in order to suppress warnings. Since there is no specific reason not to use the new resolver and since it fixes issues, change to `resolver = "2"` everywhere except library.

Author: bors