Trigger show-tech in case of VM postProcess timeout

[pau-hedgehog]

We are facing several CI failure conditions where show-tech is not executed and thus we cannot diagnose the root cause

Related to #333

[pau-hedgehog]

Maybe we should also try to capture show-tech when other on-ready commands fail:

https://github.com/githedgehog/fabricator/actions/runs/13070506705/job/36471259713

In principle it's there but not working:

                case OnReadyInspect:
                    appliedFor := 2 * time.Minute
                    if opts.ControlUpgrade {
                        appliedFor = 4 * time.Minute
                    }       
    
                    if err := c.Inspect(ctx, vlab, InspectOpts{WaitAppliedFor: appliedFor}); err != nil {
                        slog.Warn("Failed to inspect", "err", err)
    
                        if opts.CollectShowTech {
                            if err := c.VLABShowTech(ctx, vlab); err != nil {
                                slog.Warn("Failed to collect show-tech diagnostics", "err", err)
    
                                return fmt.Errorf("getting show-tech: %w", err)
                            }
                        }
    
                        return fmt.Errorf("inspecting: %w", err)
                    }
                }
            } 

[Frostman]

I think having defer ...Done() will break the logic of post actions, I need to dig deeper to understand if it's a problem