add /usr/bin to PYTHONPATH #2009

Job	Run time
run_tests_pip_branch_install_linux (2.11, 3.11)	2m 51s
run_tests_ce_windows (2.11.0.g247a9a418-1, 3.11)	9m 24s
run_tests_ee_linux (sdk-gc64-2.11.0-0-r563.linux.x86_64, release/linux/x86_64/2.11/, 3.9)	4m 6s
run_tests_ce_linux (2.11, 3.8)	3m 3s
run_tests_ee_linux (sdk-gc64-2.11.0-0-r563.linux.x86_64, release/linux/x86_64/2.11/, 3.11)	4m 24s
run_tests_pip_branch_install_windows (2.11.0.g247a9a418-1, 3.11)	10m 56s
run_tests_ee_linux (sdk-gc64-3.3.1-0-r55.linux.x86_64, release/linux/x86_64/3.3/, 3.9)	3m 7s
run_tests_ce_linux (2.11, 3.9)	2m 44s
run_tests_ee_linux (sdk-gc64-3.3.1-0-r55.linux.x86_64, release/linux/x86_64/3.3/, 3.11)	3m 3s
run_tests_ce_linux (2.11, 3.10)	3m 0s
run_tests_ce_linux (2.11, 3.11)	3m 12s
run_tests_ce_linux (master, 3.8)	3m 6s
run_tests_ce_linux (master, 3.9)	3m 13s
run_tests_ce_linux (master, 3.10)	2m 56s
run_tests_ce_linux (master, 3.11)	2m 49s
run_tests_ce_linux (2.11, 3.11, msgpack==0.5.0)	3m 2s
run_tests_ce_linux (2.11, 3.11, msgpack==0.6.2)	3m 10s
run_tests_ce_linux (2.11, 3.11, msgpack==1.0.4)	3m 1s
	1h 11m 7s

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