Add New AzureStorage "UseInstanceTableEtag" Option

[sophiatev]

Summary

What changed?

This PR introduces the option to specify the "UseInstanceTableEtag" option in host.json and bumps the DT.Core dependencies to leverage this new option.

Why is this change needed?

This makes it possible for customers to leverage the new AzureStorageOrchestrationServiceOptions.UseInstanceTableEtag setting, elaborated on in this PR.

Project checklist

• Documentation changes are not required
  • Otherwise: Documentation PR is ready to merge and referenced in pending_docs.md
• Release notes are not required for the next release
  • Otherwise: Notes added to release_notes.md
• Backport is not required
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• All required tests have been added/updated (unit tests, E2E tests)
• No extra work is required to be leveraged by OutOfProc SDKs
  • Otherwise: Work tracked here: #issue_or_pr_in_each_sdk
• No change to the version of the WebJobs.Extensions.DurableTask package
  • Otherwise: Major/minor updates are reflected in /src/Worker.Extensions.DurableTask/AssemblyInfo.cs
• No EventIds were added to EventSource logs
  • Otherwise: Ensure EventIds are within the supported range in the existing Windows infrastructure (validate via deployed telemetry). If needed, extend the range via a PR such as https://msazure.visualstudio.com/One/_git/AAPT-Antares-Websites/pullrequest/7463263?_a=files
• This change should be added to the v2.x branch
  • Otherwise: This change applies exclusively to WebJobs.Extensions.DurableTask v3.x and will be retained only in the dev and main branches
• Breaking change?
  • If yes:
    • Impact:
    • Migration guidance:

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AI-assisted code disclosure (required)

Was an AI tool used? (select one)

• No
• Yes, AI helped write parts of this PR (e.g., GitHub Copilot)
• Yes, an AI agent generated most of this PR

If AI was used:

• Tool(s):
• AI-assisted areas/files:
• What you changed after AI output:

AI verification (required if AI was used):

• I understand the code and can explain it
• I verified referenced APIs/types exist and are correct
• I reviewed edge cases/failure paths (timeouts, retries, cancellation, exceptions)
• I reviewed concurrency/async behavior
• I checked for unintended breaking or behavior changes

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Testing

Manual validation (only if runtime/behavior changed)

• Environment (OS, .NET version, components):
• Steps + observed results:

1. Tried setting the "useInstanceTableEtag" option to true and false in host.json and confirmed that the corresponding setting in AzureStorageOrchestrationServiceOptions was set accordingly, i.e.

    "extensions": {
        "durableTask": {
            "storageProvider": {
                "useInstanceTableEtag": false
            }
        }
    }

Also confirmed that if nothing is specified the default is used (false).

Notes for reviewers

• N/A