env run not disambiguating args correctly

[tgummerer]

What happened?

I was trying to use pulumi env run (which just uses esc under the hood), but forgot to set the environment name in the command line args. This resulted in a rather confusing error.

Example

$ pulumi env run -- pulumi preview                                                                        
Warning: Referring to an environment name ('pulumi') without a project is deprecated.
Please use 'v-thomas-pulumi-corp/default/pulumi' or 'default/pulumi' instead.
error: resolving command: exec: "preview": executable file not found in $PATH

With the -- disambiguation I was expecting it to warn me that there was no environment name specified on the command line.

Output of pulumi about

$ pulumi about                    
CLI          
Version      3.153.2-dev.0
Go Version   go1.22.1
Go Compiler  gc

Plugins
KIND      NAME           VERSION
resource  lambda-plugin  0.0.1
language  python         3.153.2-dev.0

Host     
OS       debian
Version  trixie/sid
Arch     x86_64

Additional context

No response

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