Ensure closing HostAgent before canceling context

[norio-nomura]

pkg/hostagent: Avoid race on using onClose

• Add onCloseMu
• Add cleanUp()
• Use onCloseMu in HostAgent.close()

pkg/hostagent:

• Ensure calling close() before cancelling the context.
• Use cleanUp() instead of defer to calling ClosableListeners.Close()

portfwd:

• Change ClosableListeners.Close() to return error
• Change Forwarder.Close() to return error

[norio-nomura]

Windows tests failed to start vm with
https://github.com/lima-vm/lima/actions/runs/17964221262/job/51093408244?pr=4081#step:9:717

? Do you want to start the instance now? (Y/n) ? Do you want to start the instance now? (Y/n) ? Do you want to start the instance now? (Y/n)

🤔

[AkihiroSuda]

Thanks

[norio-nomura]

Thanks! 🙏🏻