Configuration:
- PDF.js version: 2.0.550

Steps to reproduce the problem:
1. Render document in SVG mode `renderMode="svg"`

What is the expected behavior? (add screenshot)
Rendering annotations same way as they rendered on canvas

What went wrong? (add screenshot)
```
Warning: Unimplemented operator beginAnnotations
Warning: Unimplemented operator endAnnotations
```
annotation
                .getOperatorList(
                  partialEvaluator,
                  task,
                  renderInteractiveForms,
                  annotationStorage
                )
                .catch(function (reason) {
                  warn(
                    "getOperatorList - ignoring annotation data during " +
                      `"${task.name}" task: "${reason}".`
                  );
                  return null;
                })
            );
          }
        }
        return Promise.all(opListPromises).then(function (opLists) {
          pageOpList.addOp(OPS.beginAnnotations, []);
          for (const opList of opLists) {
            pageOpList.addOpList(opList);
          }
          pageOpList.addOp(OPS.endAnnotations, []);
          pageOpList.flush(true);
          return { length: pageOpList.totalLength };
        });
      }
    );
  }
  extractTextContent({