fix: clean up callback handling in webContents.print()

[codebytere]

Description of Change

Refs #34813.

Fixes an issue where invalid print job settings would correctly call back Invalid print settings as the failure reason, but would then not terminate the print job, leading to an eventual crash on exit. As a side effect of this, the job success status variables have been streamlined and converted into an enum.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixed an issue where invalid print job settings would correctly call back Invalid print settings as the failure reason, but would then not terminate the print job, leading to an eventual crash on exit.

[release-clerk]

Release Notes Persisted

Fixed an issue where invalid print job settings would correctly call back Invalid print settings as the failure reason, but would then not terminate the print job, leading to an eventual crash on exit.

[trop]

I was unable to backport this PR to "18-x-y" cleanly;
you will need to perform this backport manually.

[trop]

I was unable to backport this PR to "20-x-y" cleanly;
you will need to perform this backport manually.

[trop]

I was unable to backport this PR to "19-x-y" cleanly;
you will need to perform this backport manually.

[trop]

@codebytere has manually backported this PR to "20-x-y", please check out #35141