build: go 1.24

We were running behind and there were quite some deprecations to update.
This was mostly in the upstream copy/pasta package but seems quite
minimal.

vendor/google.golang.org/protobuf/internal/impl/codec_message.go

@@ -118,12 +118,9 @@ func (mi *MessageInfo) makeCoderMethods(t reflect.Type, si structInfo) {
 				},
 			}
 		case isOneof:
-			fieldOffset = offsetOf(fs, mi.Exporter)
-		case fd.IsWeak():
-			fieldOffset = si.weakOffset
-			funcs = makeWeakMessageFieldCoder(fd)
+			fieldOffset = offsetOf(fs)
 		default:
-			fieldOffset = offsetOf(fs, mi.Exporter)
+			fieldOffset = offsetOf(fs)
 			childMessage, funcs = fieldCoder(fd, ft)
 		}
 		cf := &preallocFields[i]