integration-tests: Add random delay #5

Job	Run time
Whitespace-Check / check-trailing-whitespace	3s
Tests / ubuntu-24.04-Electron 38.2.2	1m 29s
Tests / ubuntu-22.04-Electron 38.2.2	1m 29s
Tests / windows-2022-Electron 30.4.0	1m 20s
Tests / ubuntu-22.04-Electron 30.4.0	1m 30s
Tests / ubuntu-24.04-Electron 30.4.0	1m 29s
Tests / macos-26-Electron 30.4.0	1m 17s
Tests / windows-2022-Electron 38.2.2	1m 21s
Tests / macos-15-intel-Electron 30.4.0	1s
Tests / macos-15-intel-Electron 38.2.2	1s
Tests / macos-26-Electron 38.2.2	1s
Tests / macos-14-Electron 30.4.0	1s
Tests / windows-2025-Electron 38.2.2	1m 19s
Tests / windows-2025-Electron 30.4.0	1m 19s
Tests / macos-14-Electron 38.2.2	1m 17s
Tests / Test Results	21s
build	1s
	14m 19s

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