• Fix Attribute.valueToStarlark to corretcly handle TriState values.
• Fix JVM crash from VerifyException in GrpcCacheClient.onNext()
• Fix linux-sandbox actions being killed prematurely when using virtual threads

• virtual threads with linux-sandbox fix
• dynamic spawn crashing JVM fix
• aspects crashing loading fix

Basically v8.5.1 plus this Pr that we don't want to wait for: bazelbuild#27740

The goal is to make it easier to swap remote execution clusters for blue/green buildfarm deployments without catastrophic bazel errors on hot build minions. Now with 8.5.1, released two days ago, which has some other fixes and features we'd like.

Basically v8.5.0 plus this Pr that we don't want to wait for: bazelbuild#27740

The goal is to make it easier to swap remote execution clusters for blue/green buildfarm deployments without catastrophic bazel errors on hot build minions.

Multiple fixes related to deletion of multiplex worker working directories

But should work on 20.04 as well

Based on 8.1.1. with the fix cherry picked. Tested. Should hopefully be good.