feat: allow deletion of BaseImage used in completed campaign #138

Job	Run time
warmup-cache / warmup-cache	20s
docker-build / Build Docker image	56s
build / build	43s
translations / check-translations	23s
coverage / coverage-test	56s
audit / audit	22s
types / check-types	34s
formatter / check-format	23s
linting / check-linting	28s
	5m 5s

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