Tests of in-place upgrades to 7.x #164

Job	Run time
compute-versions	10s
build	1m 12s
test (6.10+b9cb801, https://packages.geldata.com/archive/x86_64-unknown-linux-gnu/gel-server-6.10...	11m 25s
test-inplace	5m 40s
test (6.0+4a229ae, https://packages.geldata.com/archive/x86_64-unknown-linux-gnu/gel-server-6.0+4...	10m 46s
test (6.9+77bc1f3, https://packages.geldata.com/archive/x86_64-unknown-linux-gnu/gel-server-6.9+7...	11m 8s
test-inplace (--rollback-and-test)	2m 19s
test-inplace (--rollback-and-reapply, -k test_link_on_target_delete -k test_edgeql_select -k test...	2m 57s
Notify in Slack on failures	3s
	45m 40s

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