included venv activation for python scripts #309

Job	Run time
bullseye armv7 / build	3m 58s
bookworm armv7 / build	3m 54s
bookworm armv7 / test (run_install_common.sh)	13m 45s
bookworm armv7 / test (run_install_faststartup.sh)	10m 39s
bookworm armv7 / test (run_install_webapp_local.sh)	21m 5s
bookworm armv7 / test (run_install_webapp_download.sh)	13m 57s
bookworm armv7 / test (run_install_libzmq_local.sh)	25m 4s
bullseye armv7 / test (run_install_common.sh)	13m 45s
bullseye armv7 / test (run_install_faststartup.sh)	10m 26s
bullseye armv7 / test (run_install_webapp_local.sh)	21m 45s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 17s
bullseye armv7 / test (run_install_libzmq_local.sh)	24m 15s
bullseye armv7 / cleanup	2s
bookworm armv7 / cleanup	3s
	2h 56m 55s

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