V2 upgrades without manager #4606

Job	Run time
Git SHA	3s
Sanitize	3m 37s
Integration tests (kind)	2m 35s
Dryrun tests	45s
Unit tests	2m 19s
Build buildtools	51s
Check operator CRDs	39s
Build previous k0s	4m 26s
Build legacy DR	4m 23s
Build upgrade	4m 23s
Build current	4m 23s
Export version specifier	4s
Determine previous stable version	6s
Integration tests	1s
Check images	1s
Create app releases	1s
E2E (on merge)	1s
E2E	1s
E2E docker	1s
Validate success	1s
	28m 41s

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