Can't perform instance upgrade from docker/WSL2

- Gel Version: 6.3+10fd4cc
- Gel CLI Version: 7.1.1+45ade47
- OS Version: Linux version 5.15.133.1-microsoft-standard-WSL2

Steps to Reproduce:

1. Run `gel instance upgrade` with an instance defined. (`gel instance upgrade -I gel`)

Output:
```
❯ gel instance upgrade -I gel
gel error: error reading instance info: "/root/.local/share/edgedb/data/gel/instance_info.json"
Caused by: No such file or directory (os error 2)
```

Using `gel` within WSL2 has proved to be difficult in almost every regard since projects aren't supported, but I've found work-arounds for almost every other operation by making calls in the REPL, but I can't find a way to perform an upgrade on an already running instance.

**Additional Background:**

Projects aren't supported in this environment, but there are several commands which fail if a project file is not located, so I have a `gel.toml` file with the following contents in my project root.

`gel.toml`:
```
[instance]
server-version = "6.1"

[project]
schema-dir = "dbschema"

[[watch]]
files = ["queries/*.edgeql"]
script = "npm run gel:generate"
```

The necessary connection parameters are already populated in the environment so most calls to `gel` work fine using the connection parameters without an instance specified, but occasionally a command requires an instance (like this upgrade command), so I linked the remote instance running in the other peer container.

```
❯ gel instance list
┌────────┬──────┬──────────┬─────────────┬────────┐
│ Kind │ Name │ Location │ Version │ Status │
├────────┼──────┼──────────┼─────────────┼────────┤
│ remote │ gel │ gel:5656 │ 6.3+10fd4cc │ up │
└────────┴──────┴──────────┴─────────────┴────────┘
```