Setting upstream pushurl to a bad value to prevent pushing prevents branch from being used to find Actions info

[jakebailey]

Describe the bug

If pushurl has been set to prevent a remote from being pushable (which I tend to do in order to ensure I never ever push upstream, https://stackoverflow.com/a/10260389), then the extension is unable to find any info about the repo, workflows, secrets, etc.

To Reproduce
Steps to reproduce the behavior:

1. Check out a fork.
2. Add an upstream.
3. Set upstream to be unpushable using (git remote set-url --push upstream no_push)
4. Set "github-actions.remote-name": "upstream" in settings.json.

Expected behavior

The repo works as normal. After all, all of the other settings point to the right places:

[remote "upstream"]
        url = git@github.com:microsoft/TypeScript.git
        fetch = +refs/heads/*:refs/remotes/upstream/*
        gh-resolved = base
        pushurl = no_push

Screenshots

With pushurl set:

With it unset:

Extension Version
v0.26.2