feat: add log level flag to rules-evaluator & frontend #2881

Job	Run time
conform	15s
golangci-lint	27s
bin	5m 52s
validate	5m 38s
e2e-testruns	1m 17s
test	5m 26s
test-export-gcm	2m 19s
test-script-gcm	1m 1s
e2e-test (^TestAlertmanager$)	5m 52s
e2e-test (^TestTLS$)	10m 27s
e2e-test (^TestBasicAuthNoPassword$)	10m 30s
e2e-test (^TestBasicAuthNoUsername$)	11m 24s
e2e-test (^TestBasicAuth$)	9m 42s
e2e-test (^TestAuthNoCredentials$)	10m 55s
e2e-test (^TestAuth$)	10m 53s
e2e-test (^TestOAuth2NoSecret$)	9m 57s
e2e-test (^TestOAuth2$)	10m 57s
e2e-test (^TestCollectorPodMonitoring$)	7m 30s
e2e-test (^TestCollectorClusterPodMonitoring$)	7m 7s
e2e-test (^TestCollectorKubeletScraping$)	5m 54s
e2e-test (^TestRuleEvaluatorNoCompression$)	5m 59s
e2e-test (^TestRuleEvaluatorGzipCompression$)	6m 7s
e2e-test (^TestWebhooksNoRBAC$)	6m 4s
	2h 31m 33s

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