Track netcoredbg stackTrace 0x80004002 upstream fix and retire workaround

[govert]

Track the upstream netcoredbg WinForms stackTrace 0x80004002 fix and remove our temporary extension-side workaround when the fix is available in a released binary we can bundle.

Upstream links:

• Bug: stackTrace fails with 0x80004002 on WinForms load-event breakpoints Samsung/netcoredbg#215
• Fix PR: Fix WinForms stackTrace E_NOINTERFACE by tolerating non-IL managed frames Samsung/netcoredbg#216

Current local behavior:

• VS Code extension 0.1.9 ships a mitigation via netcoredbg-proxy.js guarded by vbnet.debugger.workarounds.stackTraceNoInterfaceFallback (default: true).

Monitoring cadence:

• Check upstream issue/PR status weekly.
• When merged, identify first netcoredbg release/tag containing the fix.
• Revalidate WinForms breakpoint stack traces against that release.
• Update bundled debugger assets and remove/retire workaround code and setting if no longer needed.

Posted by Codex on behalf of @govert.