linux_21.lts.1+

Cherry pick PR #2118: Fix the persistent_cookie blackbox test. #353

Job	Run time
linux / initialize	47s
linux / docker-build-image	40s
linux / docker-unittest-image	43s
linux / x64_devel	11m 19s
linux / x64_debug	8m 55s
linux / x64_qa	8m 17s
linux / x64_gold	6m 36s
linux / x64_unit_test	16m 21s
linux / x64_integration_test	10m 11s
linux / ${{ matrix.name }}_on_device_${{ matrix.type }}	0s
	1h 3m 49s

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