Add deep links to Quantum OS portal for V2 workspaces and jobs

[ScottCarda-MS]

Summary

Adds portal deep link buttons to the Quantum Workspaces panel for workspaces
and jobs hosted on V2 (Quantum OS) endpoints.

Changes

Workspace links

The existing "Open the workspace in the web portal" button on workspace tree
items now links to the Quantum OS portal (manage.quantum.microsoft.com)
for V2 workspaces, instead of the Azure Portal. V1 workspaces are unchanged.

The URL includes fragment parameters so the portal can navigate directly to
the correct workspace: tenantId, subscriptionId, role, offeringId,
and workspaceId.

Job links

A new "Open the job in the web portal" inline button ($(link-external)) is
added to job tree items, but only for jobs under V2 workspaces. This is
achieved by appending a -v2 suffix to the contextValue of job tree items
that belong to V2 workspaces, and gating the button's when clause on those
context values.

All existing job buttons (delete, cancel, download results) are updated to
also match the -v2 context values so they continue to work for V2 workspace
jobs.

Files changed

• src/azure/workspaceActions.ts – getWorkspacePortalLink updated for V2;
  new getQuantumOsJobLink function added
• src/azure/treeView.ts – V2 detection added to job tree item construction;
  -v2 suffix applied to contextValue for V2 workspace jobs
• src/azure/commands.ts – jobOpenPortal command registered
• package.json – jobOpenPortal command defined; view/item/context menu
  entries added/updated for all job buttons

Screenshots

• Job details link:

• Workspace details link:

[minestarks]

looks good (and works well on my machine) - small refactoring suggestion