Fix web platform test results are not correctly checked (#3055) #6971

Job	Run time
linux-coverage / initialize	40s
linux-coverage / docker-build-image	1m 15s
linux-coverage / docker-unittest-image	51s
linux-coverage / linux_devel	10m 39s
linux-coverage / linux_debug	9m 8s
linux-coverage / linux_qa	6m 21s
linux-coverage / linux_gold	6m 7s
linux-coverage / linux_coverage_test	1h 1m 27s
linux-coverage / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	1h 36m 28s

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