Remove deprecated query condition in ListReleases (#28339)

close #24057 
call stack: 

25faee3c5f/routers/api/v1/repo/release.go (L154)

ec1feedbf5/routers/api/v1/utils/page.go (L13-L18)

ec1feedbf5/services/convert/utils.go (L15-L22)

## ⚠️ Breaking   ⚠️ (though it's not caused by this PR)
Do not use `per_page` to specify pagination; use `limit` instead

templates/swagger/v1_json.tmpl

@@ -11728,12 +11728,6 @@
             "name": "pre-release",
             "in": "query"
           },
-          {
-            "type": "integer",
-            "description": "page size of results, deprecated - use limit",
-            "name": "per_page",
-            "in": "query"
-          },
           {
             "type": "integer",
             "description": "page number of results to return (1-based)",