Quantum: Add Provider Status column to 'az quantum target list' output

[v-elegacheva]

Summary

Adds a Provider Status column to the az quantum target list table output, showing the current availability of each provider account.
Previously the table view showed only per-target status, even though the underlying data-plane response already includes the provider account's own currentAvailability. This surfaces that provider-account status so users can see at a glance whether the provider account itself is available, alongside each of its targets.

Testing

• Added unit test covering the table transform
• Added a live e2e test that runs az quantum target list against a real V2 workspace and asserts the provider status flows through to both JSON and the table column.
• Verified live: V2 workspace shows the new Provider Status column; V1 workspaces are unaffected.
• Ran azdev style quantum and python scripts/ci/test_index.py -q locally (passed).

[azure-pipelines]

Azure Pipelines:
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[Aditya Pujara (a0x1ab)]

/azp run

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).

[x-engineering-agent]

Live test results — azdev test --live --series (changed test files only)

⚠️ NO TESTS SELECTED — changed test files did not resolve to runnable tests

Selectors: test_quantum_targets (extension)
PR head ref: ekat/quantum-target-list-provider-status
PR head sha: 9602a2d4cb86e7c63d13da3a6b970510794161c9
PR base ref: main
New test files in PR: false

Changed test files run

src/quantum/azext_quantum/tests/latest/test_quantum_targets.py

Workflow run: https://github.com/Azure/issue-sentinel/actions/runs/32345986541

Last 80 lines of azdev output

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| Run Tests |
=============


=====================
| Discovering Tests |
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test index updated: /home/runner/.azdev/env_config/home/runner/work/issue-sentinel/issue-sentinel/.venv/test_index/Version 1.0.0b19 of the quantum extension is installed locally, but version 1.0.0b21 is now available.
You can use 'az extension update -n quantum' to upgrade.

latest.json

Test on modules: test_quantum_targets

WARNING: RUNNING TESTS LIVE
WARNING: 'test_quantum_targets' not found. If newly added, re-run with --discover
WARNING: No tests selected to run.

Posted by agent-assist live-test workflow.

[x-engineering-agent]

❌ Live test failed

• Live test (Tester): FAILED — dispatched live-test.yml run
  https://github.com/Azure/issue-sentinel/actions/runs/32345986541 completed
  with conclusion failure.
• CI checks: 40/40 completed checks passed, 0 failed, 0 pending.

The upstream CI checks are green, but the live test run against the changed
test files did not pass. Please review the live-test run logs above for the
failure details and address them.