Include Exception Properties at FailureDetails via Custom Provider

[nytian]

Issue describing the changes in this PR

resolves #issue_for_this_pr

Note: This PR won't work unless microsoft/durabletask-dotnet#474 is merged.

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation PR is ready to merge and referenced in pending_docs.md
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)
• My changes do not require any extra work to be leveraged by OutOfProc SDKs
  • Otherwise: That work is being tracked here: #issue_or_pr_in_each_sdk
• My changes do not change the version of the WebJobs.Extensions.DurableTask package
  • Otherwise: major or minor version updates are reflected in /src/Worker.Extensions.DurableTask/AssemblyInfo.cs
• My changes do not add EventIds to our EventSource logs
  • Otherwise: Ensure the EventIds are within the supported range in our existing Windows infrastructure. You may validate this with a deployed app's telemetry. You may also extend the range by completing a PR such as this one.
• My changes should be added to v2.x branch.
  • Otherwise: This change applies exclusively to WebJobs.Extensions.DurableTask v3.x. It will be retained only in the dev and main branches and will not be merged into the v2.x branch.

[andystaples]

Looking mostly good - just one thing to discuss

[andystaples]

Generally methods beginning with "Try" should return a bool representing if the operation was successful, and the parsed result as an "out" parameter.
I'm also a bit concerned about exception handling here - if "json" is not a valid json string, JsonNode.Parse() will throw. Can we add try/catch around the contents of this method and just return false if an exception is thrown?