Fix gcp/vpcflow module defaulting to file input (elastic#24719)

The pubsub input was renamed from google-pubsub to gcp-pubsub and the vpcflow filesets manifest
was not updated. As a result it's defaulting to the file input. This fixes the manifest.

The workaround is to explicitly set the input type:

    vpcflow:
      enabled: true
      var.input: gcp-pubsub

CHANGELOG.next.asciidoc

@@ -374,7 +374,8 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix Cisco ASA parser for message 722051. {pull}24410[24410]
 - Fix `google_workspace` pagination. {pull}24668[24668]
 - Fix Cisco ASA parser for message 302022. {issue}24405[24405] {pull}24697[24697]
-- Fix date parsing in GSuite/login fileset. {issue}24694[24694]
+- Fix gcp/vpcflow module error where input type was defaulting to file. {pull}24719[24719]
+- Fix date parsing in GSuite/login and Google Workspace/login filesets. {issue}24694[24694]
 
 *Heartbeat*
 

x-pack/filebeat/module/gcp/vpcflow/manifest.yml

@@ -2,7 +2,7 @@ module_version: "1.0"
 
 var:
   - name: input
-    default: google-pubsub
+    default: gcp-pubsub
   - name: project_id
     default: SET_PROJECT_NAME
   - name: topic