Ensure we have a URL

[code-asher]

It looks like when we switched to using the VS Code desktop module the URL was no longer included, which caused the extension to query localhost if you had never logged in before, which errors and causes the configuration to never happen.

I will fix the module as well, but I figure we can check the URL in the plugin just in case. Edit: module PR: coder/modules#107

Fixes coder/coder#10896

[matifali]

@code-asher, Does this also close #173? And do we now support the seamless transition between multiple coder deployments?

[code-asher]

It will partially support multiple deployments. If you use the "VS Code desktop" button in one deployment, then you use it in another deployment, that should work since the plugin will re-configure SSH for the new deployment. (I think this is the flow described in the #173? So we should be able to close it, if so.)

But, if you then try to re-open the previous deployment (for example from the recent menu) it will not work, because the plugin is now configured for the new deployment.

To truly support multiple deployments each deployment needs their own host in the SSH config, but right now they all use the same host coder-vscode--* so they clobber each other.

Either that or we need some way of associating a URL with a recent entry so we can re-configure SSH every time it is connected.