fix(pt): do not overwrite disp_file when restarting training #8481

Job	Run time
Test Python (1, 3.8)	24m 52s
Test Python (1, 3.11)	25m 0s
Test Python (2, 3.8)	25m 12s
Test Python (2, 3.11)	22m 55s
Test Python (3, 3.8)	25m 35s
Test Python (3, 3.11)	24m 2s
Test Python (4, 3.8)	25m 40s
Test Python (4, 3.11)	22m 49s
Test Python (5, 3.8)	25m 46s
Test Python (5, 3.11)	24m 31s
Test Python (6, 3.8)	25m 6s
Test Python (6, 3.11)	24m 47s
Combine and update integration test durations (3.8)	37s
Combine and update integration test durations (3.11)	37s
Pass testing Python	3s
	4h 57m 32s

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