Add support for deploying arbitrary cronjobs #509

Job	Run time
editorconfig	7s
test (capacity-alerts)	27s
linting (lint_jsonnet)	6s
test (release-4.11)	22s
golden (capacity-alerts)	22s
linting (lint_yaml)	5s
test (remote-write)	28s
golden (release-4.11)	22s
linting (lint_adoc)	6s
test (user-workload-monitoring)	26s
golden (remote-write)	25s
test (capacity-alerts-with-node-labels)	20s
golden (user-workload-monitoring)	1s
test (vsphere)	20s
golden (capacity-alerts-with-node-labels)	26s
test (custom-rules)	19s
golden (vsphere)	1s
test (release-4.12)	34s
golden (custom-rules)	25s
test (release-4.13)	28s
golden (release-4.12)	24s
test (team-routing)	35s
golden (release-4.13)	26s
test (release-4.14)	30s
golden (team-routing)	21s
golden (release-4.14)	25s
	8m 51s

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