Mitigate race in wslinstance's TestConnected #1640

Job	Run time
Flutter integration tests (windows)	7m 46s
Build Windows Agent Appx	6m 52s
Build wsl-pro-service debian package	1m 28s
gRPC files are up to date (agentapi)	2m 7s
C++ Quality Checks	2m 46s
gRPC files are up to date (wslserviceapi)	1m 19s
Flutter Quality checks (ubuntu, gui/packages/p4w_ms_store)	1m 31s
Flutter Quality checks (ubuntu, gui/packages/ubuntupro)	3m 17s
Go Quality checks (ubuntu, agentapi)	44s
Run Go tests with mocks (ubuntu, windows-agent)	4m 33s
Go Quality checks (ubuntu, contractsapi)	29s
Flutter Quality checks (windows, gui/packages/p4w_ms_store)	4m 16s
Run Go tests with mocks (ubuntu, wsl-pro-service)	2m 49s
Go Quality checks (ubuntu, mocks)	51s
Flutter Quality checks (windows, gui/packages/ubuntupro)	5m 33s
Go Quality checks (ubuntu, storeapi/go-wrapper/microsoftstore)	26s
Run Go tests with mocks (windows, storeapi/go-wrapper/microsoftstore)	2m 33s
Go Quality checks (ubuntu, windows-agent)	53s
Run Go tests with mocks (windows, windows-agent)	3m 12s
Go Quality checks (ubuntu, wsl-pro-service)	51s
Run Go tests with mocks (windows, common)	2m 0s
Go Quality checks (ubuntu, common)	41s
Go Quality checks (windows, agentapi)	1m 24s
Go Quality checks (windows, contractsapi)	1m 14s
Go Quality checks (windows, mocks)	2m 24s
Go Quality checks (windows, storeapi/go-wrapper/microsoftstore)	1m 42s
Go Quality checks (windows, windows-agent)	2m 28s
Go Quality checks (windows, end-to-end)	3m 24s
Go Quality checks (windows, common)	1m 33s
	1h 11m 6s

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