[24.03 LTS SP1][x86/RISC-V] ModuleNotFoundError: No module named 'keras.saving.legacy'

**【环境信息】**
OS 版本: 24.03 LTS SP1
架构: x86 、 riscv64
python3-Keras 版本: 2.12.0-1.oe2403sp1
python3-tensorflow 版本: 2.12.1-2.oe2403sp1

**【问题复现步骤】**

在 24.03 LTS SP1 版本中执行以下操作，在 x86 和 riscv64 架构的镜像中都可以复现

运行 https://gitee.com/openeuler/mugen/tree/master/testcases/cli-test/python-Keras/oe_test_Keras 目录下 Keras_1.py

```
sudo yum install python3-tensorflow python3-Keras
python3 ./Keras_1.py
```

打印 keras 版本号也可以复现

```
python3 -c "import tensorflow as tf; print(tf.keras.__version__)"
```

**【实际结果】**
报错 ModuleNotFoundError: No module named 'keras.saving.legacy'

```
[root@localhost oe_test_Keras]# python3 Keras_1.py
Traceback (most recent call last):
  File "/root/mugen/testcases/cli-test/python-Keras/oe_test_Keras/Keras_1.py", line 2, in <module>
    from keras.models import Model
  File "/usr/lib/python3.11/site-packages/keras/__init__.py", line 21, in <module>
    from keras import models
  File "/usr/lib/python3.11/site-packages/keras/models/__init__.py", line 18, in <module>
    from keras.engine.functional import Functional
  File "/usr/lib/python3.11/site-packages/keras/engine/functional.py", line 26, in <module>
    from keras import backend
  File "/usr/lib/python3.11/site-packages/keras/backend.py", line 35, in <module>
    from keras.engine import keras_tensor
  File "/usr/lib/python3.11/site-packages/keras/engine/keras_tensor.py", line 19, in <module>
    from keras.utils import object_identity
  File "/usr/lib/python3.11/site-packages/keras/utils/__init__.py", line 20, in <module>
    from keras.saving.legacy.serialization import deserialize_keras_object
ModuleNotFoundError: No module named 'keras.saving.legacy'
```

**二、缺陷分析结构反馈**
影响性分析说明：

缺陷严重等级:(Critical/High/Moderate/Low)

缺陷根因说明:

受影响版本排查(受影响/不受影响):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

修复是否涉及abi变化(是/否):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

src-openEuler/python-Keras

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