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Fix couple errors missing codes (#3666)

### Requirements

* Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
* All new code requires tests to ensure against regressions.

### Description of the Change

#3656 added a couple utils for setting `code` on errors. I fixed a couple here and wanted to make sure I was on the right track before making more changes.

### Alternate Designs

N/A

### Why should this be in core?

Codes help identify errors as mocha errors at a glance without using custom error types, and better DX is always good.

### Benefits

:point_up: 

### Possible Drawbacks

None that I can see

### Applicable issues

#3656, #3125. semver-patch

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