Update apache.status fields (#206)

Update the fields for the apache.status data stream. The fields reported from agent changed
due to elastic/beats#23022.

Author: andrewkroh

test/packages/apache/data_stream/status/fields/fields.yml

@@ -1,10 +1,6 @@
 - name: apache.status
   type: group
   fields:
-    - name: hostname
-      type: keyword
-      description: |
-        Apache hostname.
     - name: total_accesses
       type: long
       description: |