adding field names for aws_ec2 provider (#16403)

x-pack/libbeat/autodiscover/providers/aws/ec2/_meta/fields.yml

@@ -1,11 +1,56 @@
-- key: ec2_listener
+- key: aws.ec2
  title: "EC2 Listener"
  description: >
  AWS EC2 Listeners
  short_config: false
  release: experimental
  fields:
- - name: ec2_listener
+ - name: aws.ec2
  type: group
  description: >
  Represents an AWS EC2 Listener, e.g. state of an EC2.
+ fields:
+ - name: architecture
+ type: keyword
+ description: The EC2 instance architecture (i386 | x86_64 | arm64 ).
+ - name: image.id
+ type: keyword
+ description: The ID of the image used to launch the instance.
+ - name: kernel.id
+ type: keyword
+ description: The kernel associated with this instance, if applicable.
+ - name: monitoring.state
+ type: keyword
+ description: Indicates whether detailed monitoring is enabled (disabled | enabled).
+ - name: private.dns_name
+ type: keyword
+ description: The private DNS name.
+ - name: private.ip
+ type: keyword
+ description: The IPv4 address of the network interface within the subnet.
+ - name: public.dns_name
+ type: keyword
+ description: The public DNS name.
+ - name: public.ip
+ type: keyword
+ description: The public IPv4 address assigned to the instance, if applicable.
+ - name: root_device_name
+ type: keyword
+ description: The device name of the root device volume (for example, /dev/sda1).
+ - name: state.code
+ type: keyword
+ description: The reason code for the state change.
+ - name: state.name
+ type: keyword
+ description: A message that describes the state change.
+ - name: subnet.id
+ type: keyword
+ description: The ID of the subnet in which the instance is running.
+ - name: vpc.id
+ type: keyword
+ description: The ID of the VPC that the instance is running in.
+ - name: tags.*
+ type: object
+ object_type: keyword
+ object_type_mapping_type: "*"
+ description: Tag key value pairs from aws resources.