Improve the run_rpc_tool script #100

Job	Run time
bookworm armv7 / build	14m 44s
bullseye armv7 / build	14m 59s
bookworm armv7 / test (run_install_common.sh)	14m 2s
bookworm armv7 / test (run_install_faststartup.sh)	9m 16s
bookworm armv7 / test (run_install_webapp_local.sh)	14m 39s
bookworm armv7 / test (run_install_webapp_download.sh)	14m 11s
bookworm armv7 / test (run_install_libzmq_local.sh)	24m 13s
bullseye armv7 / test (run_install_common.sh)	13m 47s
bullseye armv7 / test (run_install_faststartup.sh)	9m 13s
bullseye armv7 / test (run_install_webapp_local.sh)	14m 50s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 56s
bullseye armv7 / test (run_install_libzmq_local.sh)	23m 9s
bullseye armv7 / cleanup	1s
bookworm armv7 / cleanup	3s
	3h 2m 3s

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