[SSA] Clear Shape Cache on Load Error (#82850)
If we do not clear when loading shape cache items errors out, it instead produces unhelpful errors on retry.
Every single subsequent test errors out with `method 'unary' already defined`.
See this example error in PR #80860:
```
ERROR [0.000s]: test_zerodim_cpu (jit.test_device_analysis.TestDeviceAnalysis) [In device: (device(type='cpu'), device(type='cpu')), expected: cpu,
mul
shapes: ((1, 2, 2), (2, 2)),
devices: (device(type='cpu'), device(type='cpu'))]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/var/lib/jenkins/workspace/test/jit/test_device_analysis.py", line 66, in assert_device_equal
self.prop_device_on_graph(graph, in_devices, in_shapes)
File "/var/lib/jenkins/workspace/test/jit/test_device_analysis.py", line 55, in prop_device_on_graph
torch._C._jit_pass_propagate_shapes_on_graph(graph)
RuntimeError: expected eof but found ':' here:
aten::convolution : (Tensor, Tensor, Tensor?, int[], int[], int[], bool, int[], int) -> (Tensor)
~ <--- HERE
======================================================================
ERROR [0.000s]: test_zerodim_cpu (jit.test_device_analysis.TestDeviceAnalysis) [In device: (device(type='cpu'), device(type='cpu')), expected: cpu,
mul
shapes: ((1, 2, 2), ()),
devices: (device(type='cpu'), device(type='cpu'))]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/var/lib/jenkins/workspace/test/jit/test_device_analysis.py", line 66, in assert_device_equal
self.prop_device_on_graph(graph, in_devices, in_shapes)
File "/var/lib/jenkins/workspace/test/jit/test_device_analysis.py", line 55, in prop_device_on_graph
torch._C._jit_pass_propagate_shapes_on_graph(graph)
RuntimeError: method 'unary' already defined.
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82850
Approved by: https://github.com/davidberard98
