more and more cleanup #151

Job	Run time
check_if_release_branch	2s
towncrier_check	1m 32s
changed_files	1m 35s
build mirrord	0s
vscode_e2e_on_release_branch	0s
intellij_e2e_on_release_branch	0s
check-rust-docs	4m 5s
lint	6m 18s
test_agent	3m 54s
test_agent_image	10m 24s
integration_tests	7m 0s
lint_markdown	0s
macos_tests	5m 29s
e2e (docker)	6m 4s
e2e (containerd)	5m 57s
ci	3s
	52m 23s

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