Define default value for otelcol datasets

Author: jsoriano

test/packages/parallel/httpcheck/_dev/test/policy/test-eprcheck.expected

@@ -25,7 +25,7 @@ processors:
             - context: datapoint
               statements:
                 - set(attributes["data_stream.type"], "metrics")
-                - set(attributes["data_stream.dataset"], "httpcheck.check")
+                - set(attributes["data_stream.dataset"], "httpcheckreceiver")
                 - set(attributes["data_stream.namespace"], "ep")
 receivers:
     httpcheck/componentid-0:

test/packages/parallel/httpcheck/manifest.yml

@@ -31,6 +31,7 @@ policy_templates:
     title: HTTP Check
     description: Perform HTTP checks and collect its results.
     input: otelcol
+    otelcol_dataset: httpcheckreceiver
     template_path: input.yml.hbs
     vars:
       - name: period