regression: Ensure BoardListWatch gRPC call correctly release resources #4654

Job	Run time
run-determination	1s
package-name-prefix	1s
Create artifact Windows_X86-32	1m 8s
Create artifact Windows_X86-64	1m 5s
Create artifact Linux_X86-32	1m 4s
Create artifact Linux_X86-64	1m 7s
Create artifact Linux_ARMv6	59s
Create artifact Linux_ARMv7	1m 2s
Create artifact Linux_ARM64	54s
Create artifact macOS_64	1m 29s
Create artifact macOS_ARM64	1m 42s
Create artifact rpc-protocol-files	16s
Create artifact configuration-schema	15s
checksums	8s
	11m 11s

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