cancelled vs canceled - standardize spelling in codebase

[rebeccahhh]

Please confirm the following

• I agree to follow this project's code of conduct.
• I have checked the current issues for duplicates.
• I understand that AWX is open source software provided for free and that I might not receive a timely response.
• I am NOT reporting a (potential) security vulnerability. (These should be emailed to security@ansible.com instead.)

Bug Summary

There are a couple of places that still use "cancelled" even though AWX appears to have standardized "canceled"
https://github.com/search?q=repo%3Aansible%2Fawx%20cancelled&type=code <- only one in particular looks to be problematic from a functionality perspective within the UI for WSRelay.
I have not tested this to know if it impacts functionality though.

AWX version

24.3.1

Select the relevant components

• UI
• UI (tech preview)
• API
• Docs
• Collection
• CLI
• Other

Installation method

docker development environment

Modifications

no

Ansible version

n/a

Operating system

n/a

Web browser

n/a

Steps to reproduce

search codebase for "cancelled" or "canceled" and compare

Expected results

n/a

Actual results

n/a

Additional information

No response

[TheRealHaoLiu]

tagged as good-first-issue

if anyone is interested in contributing, contribution are welcome and appreciated

[abreyaustin]

Working on this now