Migrate add_hrect from annotation to shape/label

[chanlii]

As title, migrate add_hrect from using annotation to label as source of truth to build annotation.
Unit test result:

PS C:\Users\licha\plotly.py> python -m pytest -q tests/test_optional/test_autoshapes/test_annotated_shapes.py -k annotated                                                                                                 
..........                                                                                                                                                                                                          [100%] 
==================================================================================================== warnings summary ====================================================================================================
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_add_annotated_shape_single_plot
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_add_annotated_shape_multi_plot
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_bad_annotation_position
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_position_order
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_annotation_position_override
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_default_annotation_positions
tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_all_annotation_positions
  C:\Users\licha\plotly.py\plotly\basedatatypes.py:430: FutureWarning:

  annotation_* kwargs are deprecated; use label={...} to leverage Plotly.js shape labels.

tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_all_annotation_positions
  C:\Users\licha\plotly.py\plotly\basedatatypes.py:4204: FutureWarning:

  annotation_bgcolor/annotation_bordercolor are not supported on shape.label and will be ignored; use label.font/color or a background shape instead.

tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_all_annotation_positions
  C:\Users\licha\plotly.py\plotly\basedatatypes.py:4253: FutureWarning:

  annotation_bgcolor/annotation_bordercolor are not supported on shape.label and will be ignored; use label.font/color or a background shape instead.

tests/test_optional/test_autoshapes/test_annotated_shapes.py::test_all_annotation_positions
  C:\Users\licha\plotly.py\plotly\basedatatypes.py:4301: FutureWarning:

  annotation_bgcolor/annotation_bordercolor are not supported on shape.label and will be ignored; use label.font/color or a background shape instead.

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
10 passed, 10 warnings in 3.76s

[nochinxx]

looks good