Include more annotations on Helm releases e.g. Sample metadata

[craigwalton-dsit]

Some users frame their evals as a single Task but with many Samples. We currently only include the task name in the annotations (which end up as annotations on pods etc.). This can make it hard when you see a failed Pod to understand what it relates to.

This is because this is what Inspect provides us with. But it also provides the Sample metadata.

2 ideas:

1. Suggest that Inspect adds a sample id to the inspect SandboxEnvironment interface (4 methods). This is quite a faff as its a change in the core of inspect which lots of environment providers depend on. And sample id might not be useful to some people.
2. Read an optional HELM_ANNOTATIONS value from the Sample.metadata dict (which Inspect gives us already). This would itself be a dict and we'd put it all into the release annotations so you'd see any values you set there alongside the inspectTaskName.

We could log this additional metadata when we have a Helm install error for example.

You could also use this for injecting more useful info in, such as the eval set name or other identifiers.

Note: We'd have to sort out the fact that the metadata parameter is typed as dict[str, str] whereas I think it ought to be dict[str, Any] as per Sample.metadata. If it really can't be dict[str, Any] then we'd have to define a convention like HELM_ANNOTATION_*.