[Metricbeat] Fix CPU/disk/network visualizations in EC2 overview dashboard (#45117)

Updates the CPU/disk/network metric field names in the "[Metricbeat AWS] EC2 Overview" dashboard.

The "[Metricbeat AWS] EC2 Overview" dashboard that comes with the AWS modules was still using the old metric field names that are no longer in use, resulting in a dashboard with multiple empty visualizations.

Here are the current changes:


| Old                          | New                          | Formatter |
| ---------------------------- | ---------------------------- | --------- |
| `aws.ec2.cpu.total.pct`      | `host.cpu.usage`             | `percent` |
| `aws.ec2.diskio.read.bytes`  | `host.disk.read.bytes`       | `bytes`   |
| `aws.ec2.diskio.write.bytes` | `host.disk.write.bytes`      | `bytes`   |
| `aws.ec2.network.in.bytes`   | `host.network.ingress.bytes` | `bytes`   |
| `aws.ec2.network.out.bytes`  | `host.network.egress.bytes`  | `bytes`   |

---------

Co-authored-by: kaiyan-sheng <kaiyan.sheng@elastic.co>

Author: zmoog

x-pack/metricbeat/module/aws/_meta/kibana/7/visualization/15818fd0-f7f9-11e8-af03-c999c9dea608-ecs.json

@@ -35,13 +35,13 @@
                         "color": "rgba(104,188,0,1)",
                         "fill": "0",
                         "filter": "",
-                        "formatter": "number",
+                        "formatter": "bytes",
                         "id": "61ca57f1-469d-11e7-af02-69e470af7417",
                         "label": "AWS EC2 Network In Bytes",
                         "line_width": "2",
                         "metrics": [
                             {
-                                "field": "aws.ec2.network.in.bytes",
+                                "field": "host.network.ingress.bytes",
                                 "id": "61ca57f2-469d-11e7-af02-69e470af7417",
                                 "type": "avg"
                             }

x-pack/metricbeat/module/aws/_meta/kibana/7/visualization/233b3400-f7f9-11e8-af03-c999c9dea608-ecs.json

@@ -35,13 +35,13 @@
                         "color": "rgba(104,188,0,1)",
                         "fill": "0",
                         "filter": "",
-                        "formatter": "number",
+                        "formatter": "bytes",
                         "id": "61ca57f1-469d-11e7-af02-69e470af7417",
                         "label": "AWS EC2 Network Out Bytes",
                         "line_width": "2",
                         "metrics": [
                             {
-                                "field": "aws.ec2.network.out.bytes",
+                                "field": "host.network.egress.bytes",
                                 "id": "61ca57f2-469d-11e7-af02-69e470af7417",
                                 "type": "avg"
                             }

x-pack/metricbeat/module/aws/_meta/kibana/7/visualization/be8828d0-f7f6-11e8-af03-c999c9dea608-ecs.json

@@ -40,7 +40,7 @@
                         "line_width": 1,
                         "metrics": [
                             {
-                                "field": "aws.ec2.cpu.total.pct",
+                                "field": "host.cpu.usage",
                                 "id": "61ca57f2-469d-11e7-af02-69e470af7417",
                                 "type": "avg"
                             }
@@ -54,7 +54,7 @@
                         "steps": 0,
                         "terms_field": "cloud.instance.id",
                         "terms_order_by": "61ca57f2-469d-11e7-af02-69e470af7417",
-                        "terms_size": "5"
+                        "terms_size": "10"
                     }
                 ],
                 "show_grid": 1,
@@ -76,4 +76,4 @@
     "type": "visualization",
     "updated_at": "2021-08-04T16:30:33.734Z",
     "version": "WzMzOTcsMV0="
-}
+}

x-pack/metricbeat/module/aws/_meta/kibana/7/visualization/f1db6ec0-f7f8-11e8-af03-c999c9dea608-ecs.json

@@ -38,13 +38,13 @@
                             "language": "kuery",
                             "query": ""
                         },
-                        "formatter": "number",
+                        "formatter": "bytes",
                         "id": "61ca57f1-469d-11e7-af02-69e470af7417",
                         "label": "AWS EC2 DiskIO Read Bytes",
                         "line_width": "2",
                         "metrics": [
                             {
-                                "field": "aws.ec2.diskio.read.bytes",
+                                "field": "host.disk.read.bytes",
                                 "id": "61ca57f2-469d-11e7-af02-69e470af7417",
                                 "type": "avg"
                             }

x-pack/metricbeat/module/aws/_meta/kibana/7/visualization/fed59380-f7f8-11e8-af03-c999c9dea608-ecs.json

@@ -35,13 +35,13 @@
                         "color": "rgba(104,188,0,1)",
                         "fill": "0",
                         "filter": "",
-                        "formatter": "number",
+                        "formatter": "bytes",
                         "id": "61ca57f1-469d-11e7-af02-69e470af7417",
                         "label": "AWS EC2 DiskIO Write Bytes",
                         "line_width": "2",
                         "metrics": [
                             {
-                                "field": "aws.ec2.diskio.write.bytes",
+                                "field": "host.disk.write.bytes",
                                 "id": "61ca57f2-469d-11e7-af02-69e470af7417",
                                 "type": "avg"
                             }