Fix advanced-rebootpy datetime EDecimal type issue. (sonic-net#20054)

issue seen on 2700 https://dev.azure.com/mssonic/internal/_build/results?buildId=913225&view=logs&j=76acabad-01e9-5c52-6fe6-d396d63e85d2&t=55864d99-7fe9-5504-0078-bfbb010fc228&l=4109

2025-08-01T12:37:49.4730701Z 2025-08-01 12:37:43 : --------------------------------------------------
2025-08-01T12:37:49.4731666Z 2025-08-01 12:37:43 : Fails:
2025-08-01T12:37:49.4732373Z 2025-08-01 12:37:43 : --------------------------------------------------
2025-08-01T12:37:49.4733177Z 2025-08-01 12:37:43 : FAILED:dut:Traceback (most recent call last):
2025-08-01T12:37:49.4733944Z   File "/root/ptftests/py3/advanced-reboot.py", line 1445, in runTest
2025-08-01T12:37:49.4734679Z     self.handle_advanced_reboot_health_check()
2025-08-01T12:37:49.4735464Z   File "/root/ptftests/py3/advanced-reboot.py", line 1167, in handle_advanced_reboot_health_check
2025-08-01T12:37:49.4736205Z     self.examine_flow()
2025-08-01T12:37:49.4736865Z   File "/root/ptftests/py3/advanced-reboot.py", line 2138, in examine_flow
2025-08-01T12:37:49.4737694Z     self.disruption_stop = datetime.datetime.fromtimestamp(
2025-08-01T12:37:49.4738332Z                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-08-01T12:37:49.4739025Z TypeError: 'EDecimal' object cannot be interpreted as an integer
2025-08-01T12:37:49.4739366Z
2025-08-01T12:37:49.4740035Z 2025-08-01 12:37:43 : ==================================================
2025-08-01T12:37:49.4740823Z 2025-08-01 12:37:43 : Disabling arp_responder
2025-08-01T12:37:49.4741111Z

Author: ryanzhu706

ansible/roles/test/files/ptftests/py3/advanced-reboot.py

@@ -2134,9 +2134,9 @@ def examine_flow(self, filename=None):
                         self.log("")
                         if not self.disruption_start:
                             self.disruption_start = datetime.datetime.fromtimestamp(
-                                prev_time)
+                               float(prev_time))
                         self.disruption_stop = datetime.datetime.fromtimestamp(
-                            received_time)
+                            float(received_time))
                 prev_payload = received_payload
                 prev_time = received_time
             self.log(