Fix having multiple type keys in eck-beats chart. (elastic#7523)

* Fix multiple `type` keys in eck-beats chart.
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Signed-off-by: Michael Montgomery <mmontg1@gmail.com>
(cherry picked from commit 91d6639)

deploy/eck-stack/charts/eck-beats/templates/beats.yaml

@@ -12,8 +12,8 @@ metadata:
     {{- end }}
 spec:
   version: {{ required "A Beat version is required" .Values.version }}
-  type: {{ required "A Beat type is required" .Values.spec.type }}
   {{- if and (not (hasKey .Values.spec "daemonSet")) (not (hasKey .Values.spec "deployment")) }}
   {{ fail "At least one of daemonSet or deployment is required for a functional Beat" }}
   {{- end }}
+  {{- if not .Values.spec.type }}{{ fail "A Beat type is required" }}{{- end }}
   {{- toYaml .Values.spec | nindent 2 }}