refactor(api-rest): allow for body in delete request

[PatrickBichiou]

Description of changes

In the api-rest/index.ts file i change the type of the delete operation to not omit the 'body' attribute. With this change the type of delete allows for an body.
I am not really sure if this is the only changed needed to use body on delete request for rest-api. Maybe some of the amplify team will check on this and provide some guidance if any other changes are necessary.

Issue #, if available

12844

Description of how you validated changes

• add body in type as for the other types of http methods like put and post.
• run the yarn test suite

Checklist

• PR description included
• yarn test passes
• Unit Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

Checklist for repo maintainers

• Verify E2E tests for existing workflows are working as expected or add E2E tests for newly added workflows
• New source file paths included in this PR have been added to CODEOWNERS, if appropriate

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.