fix: Clear EndpointStatuses for PodMonitoring without endpoints #2957

Job	Run time
bin	5m 55s
e2e-testruns	1m 16s
conform	19s
golangci-lint	1m 3s
test	5m 45s
test-export-gcm	2m 4s
test-script-gcm	1m 9s
validate	6m 2s
e2e-test (^TestAlertmanager$)	5m 49s
e2e-test (^TestTLS$)	10m 4s
e2e-test (^TestBasicAuthNoPassword$)	11m 6s
e2e-test (^TestBasicAuthNoUsername$)	11m 18s
e2e-test (^TestBasicAuth$)	10m 57s
e2e-test (^TestAuthNoCredentials$)	11m 3s
e2e-test (^TestAuth$)	9m 48s
e2e-test (^TestOAuth2NoSecret$)	11m 4s
e2e-test (^TestOAuth2$)	9m 47s
e2e-test (^TestCollectorPodMonitoring$)	7m 8s
e2e-test (^TestCollectorClusterPodMonitoring$)	7m 26s
e2e-test (^TestCollectorKubeletScraping$)	5m 44s
e2e-test (^TestRuleEvaluatorNoCompression$)	5m 53s
e2e-test (^TestRuleEvaluatorGzipCompression$)	5m 50s
e2e-test (^TestWebhooksNoRBAC$)	5m 39s
	2h 32m 9s

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