Support rectangle in draw_boxes and relocate draw_ser_results

[hongziqi]

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• You have read the Contributing Guidelines on pull requests
• Your code builds clean without any errors or warnings
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• You have added unit tests

Motivation

1. Update mindocr.utils.visualize.draw_boxes function to support rectangle draw_type:
   The current draw_boxes function only supports drawing polygons. Adding support for drawing rectangles will enhance its versatility and make it more useful for various applications that require drawing bounding boxes in both polygon and rectangle formats.

2. Move tools.infer.text.predict_ser.draw_ser_results to mindocr.utils.visualize:
   The draw_ser_results function is currently located in tools.infer.text.predict_ser, which may not be the most intuitive location for a utility function that deals with visualizing OCR results. Moving it to mindocr.utils.visualize will improve the organization of the codebase, making it easier for developers to find and use this function.

Test Plan

• draw_boxes is only used by tools/infer/text/predict_det.py
• draw_ser_results is only used by tools/infer/text/predict_ser.py

1. before change:
   case one (python tools/infer/text/predict_det.py --image_dir configs/kie/vi_layoutxlm/example.jpg --det_algorithm DB++):
   

case two(python tools/infer/text/predict_ser.py --det_algorithm DB++ --rec_algorithm CRNN_CH --image_dir configs/kie/vi_layoutxlm/example.jpg)

2. after change:
   case one (python tools/infer/text/predict_det.py --image_dir configs/kie/vi_layoutxlm/example.jpg --det_algorithm DB++):
   

case two(python tools/infer/text/predict_ser.py --det_algorithm DB++ --rec_algorithm CRNN_CH --image_dir configs/kie/vi_layoutxlm/example.jpg)

case three(test for draw_boxes with rectangle draw_type):

def test_draw_boxes_rectangle():
    # 创建一个空白图像
    image = np.zeros((400, 400, 3), dtype=np.uint8)

    # 定义矩形框的坐标
    bboxes = np.array([
        [50, 50, 150, 150],
        [200, 200, 300, 300]
    ])

    # from mindocr.utils.visualize import draw_boxes, show_imgs
    result_image = draw_boxes(image, bboxes, draw_type="rectangle")
    show_imgs([result_image], show=False, save_path="./inference_results/test_rectangle_output.jpg")
test_draw_boxes_rectangle()