Auto merge of #85786 - GuillaumeGomez:error-code-checker-improvement, r=Mark-Simulacrum
Auto merge of #85786 - GuillaumeGomez:error-code-checker-improvement, r=Mark-Simulacrum

Error code checker improvement

Just realized that some error codes shouldn't be ignored anymore. So I updated the script to ensure that if an error code is tested and ignored, it will trigger an error.

graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust