Bug: Gerrit Upload Swallowing Errors

[lecafard]

Description

Steps to Reproduce the Problem

1. Create a change.
2. Push to a non existent branch using jj gerrit upload -r @ -b non-existent-branch

Expected Behavior

The gerrit upload should fail and show an error message indicating that it failed. This is the output
I get when using git directly.

> git push origin c7307b5c:refs/for/non-existent-branch
Enumerating objects: 5, done.
Counting objects: 100% (5/5), done.
Delta compression using up to 24 threads
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 333 bytes | 333.00 KiB/s, done.
Total 3 (delta 1), reused 0 (delta 0), pack-reused 0 (from 0)
remote: Resolving deltas: 100% (1/1)
remote: Processing changes: refs: 1, done    
To ssh://gerit.example.com:29418/repo
 ! [remote rejected] c7307b5c -> refs/for/non-existent-branch (branch non-existent-branch not found)
error: failed to push some refs to 'ssh://gerrit.example.com:29418/repo`

Actual Behavior

> jj gerrit upload -r @ -b non-existent-branch         
Found 1 heads to push to Gerrit (remote 'origin'), target branch 'non-existent-branch'
Pushing qolnzvzl c7307b5c this should fail
remote: Resolving deltas: 100% (1/1)
remote: Processing changes: refs: 1, done

> $?
zsh: command not found: 0

Specifications

• Platform: Linux
• Version: v0.37.0

[lecafard]

Fixed in #8569