Add owner and parent fields clarification to docs (#35023)

Issue: https://github.com/go-gitea/gitea/issues/9637

Changes introduced: I have clarified the problematic terms (owner and
parent) in all affected endpoints.

The changes were made to relevant:

- HTTP endpoint parameters' descriptions
- response/request models' fields

This MR is big, but most changes are the same. If you'd like me to break
this MR into several smaller ones, let me know :)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/api/v1/repo/actions_run.go

@@ -21,7 +21,7 @@ func DownloadActionsRunJobLogs(ctx *context.APIContext) {
 	// parameters:
 	// - name: owner
 	//   in: path
-	//   description: name of the owner
+	//   description: owner of the repo
 	//   type: string
 	//   required: true
 	// - name: repo