test(client): port legacy client integration tests (#77) #269

Job	Run time
Check Style	17s
features	43s
Test with Miri	51s
Check MSRV (1.63)	1m 25s
Test stable on ubuntu-latest	29s
Test stable on windows-latest	1m 11s
Test stable on macOS-latest	42s
Test beta on ubuntu-latest	33s
Test beta on windows-latest	1m 4s
Test beta on macOS-latest	1m 0s
Test nightly on ubuntu-latest	36s
Test nightly on windows-latest	1m 12s
Test nightly on macOS-latest	58s
Build docs	0s
CI is green	0s
	11m 1s

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