activate venv directly #1893

Job	Run time
run_tests_ce_linux (2.11, 3.8)	42s
run_tests_ee_linux (sdk-gc64-2.11.0-0-r563.linux.x86_64, release/linux/x86_64/2.11/, 3.11)	1m 5s
run_tests_ce_windows (2.11.0.g247a9a418-1, 3.11)	3m 59s
run_tests_ce_linux (2.11, 3.9)	44s
run_tests_ce_linux (2.11, 3.10)	52s
run_tests_pip_branch_install_linux (2.11, 3.11)	1m 4s
run_tests_pip_branch_install_windows (2.11.0.g247a9a418-1, 3.11)	3m 58s
run_tests_ce_linux (2.11, 3.11)	42s
run_tests_ce_linux (master, 3.8)	54s
run_tests_ce_linux (master, 3.9)	37s
run_tests_ce_linux (master, 3.10)	46s
run_tests_ce_linux (master, 3.11)	51s
run_tests_ce_linux (2.11, 3.11, msgpack==0.5.0)	47s
run_tests_ce_linux (2.11, 3.11, msgpack==0.6.2)	54s
run_tests_ce_linux (2.11, 3.11, msgpack==1.0.4)	1m 11s
	19m 6s

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