API content type refactor flow. More information can be found
[here](https://www.notion.so/appsmith/API-Content-type-Header-Refactor-07f2f944e13f43148210c2461cf3fcda?d=339958cf1d374fefadfa437f86d95627)
Fixes#18473
- Bug fix (non-breaking change which fixes an issue)
- New feature (non-breaking change which adds functionality)
### Test Plan
> Add Testsmith test cases links that relate to this PR
### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
## Checklist:
### Dev activity
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
### QA activity:
- [ ] Test plan has been approved by relevant developers
- [ ] Test plan has been peer reviewed by QA
- [ ] Cypress test cases have been added and approved by either SDET or
manual QA
- [ ] Organized project review call with relevant stakeholders after
Round 1/2 of QA
- [ ] Added Test Plan Approved label after reveiwing all Cypress test
---------
Co-authored-by: Aishwarya UR <aishwarya@appsmith.com>
Co-authored-by: PiyushPushkar02 <118709669+PiyushPushkar02@users.noreply.github.com>
Co-authored-by: Sumit Kumar <sumit@appsmith.com>
Co-authored-by: Aishwarya-U-R <91450662+Aishwarya-U-R@users.noreply.github.com>
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