fix(groups): remove Group->user edge (#2304) #273

Job	Run time
test / Test (main-module)	4m 19s
test / Test (artifact-cas)	50s
test / Test (controlplane)	7m 4s
test / Test (cli)	2m 3s
init_attestation	0s
Release CLI and control-plane/artifact-cas container images	0s
Finish Attestation	0s
modify_release_notes	0s
test / Test (controlplane)	6m 55s
test / Test (main-module)	4m 19s
test / Test (cli)	2m 3s
test / Test (artifact-cas)	50s
init_attestation	12s
Release CLI and control-plane/artifact-cas container images	11m 34s
Finish Attestation	10s
modify_release_notes	5s
	40m 24s

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