define-syntax-parser-to-define-syntax-parse-rule-simple ignores syntax/loc on the output

[benknoble]

See https://github.com/jackfirth/resyntax/blob/43f5fc6153b1d1dc9fff65a23391c4aac604fb22/default-recommendations/syntax-parse-shortcuts.rkt#L48 and https://github.com/benknoble/frosthaven-manager/pull/126

[jackfirth]

Looks like this logic is wrong. It should only match when the last body form is wrapped in syntax, not always match and then strip the syntax if it's present.

This is a bug that was also present in the other define-syntax-parse-rule shortcut initially. When I was fixing that in Copilot's implementation, I failed to notice the other rule had the same problem.