Bring back spotify backend #6

Job	Run time
bookworm armv7 / build	3m 45s
bullseye armv7 / build	4m 0s
bookworm armv7 / test (run_install_common.sh)	14m 58s
bookworm armv7 / test (run_install_faststartup.sh)	10m 17s
bookworm armv7 / test (run_install_webapp_local.sh)	14m 23s
bookworm armv7 / test (run_install_webapp_download.sh)	14m 37s
bookworm armv7 / test (run_install_libzmq_local.sh)	14m 57s
bullseye armv7 / test (run_install_common.sh)	14m 36s
bullseye armv7 / test (run_install_faststartup.sh)	9m 44s
bullseye armv7 / test (run_install_webapp_local.sh)	14m 46s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 45s
bullseye armv7 / test (run_install_libzmq_local.sh)	14m 49s
bookworm armv7 / cleanup	2s
bullseye armv7 / cleanup	3s
	2h 25m 42s

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