update apm index pattern

[simitt]

Summary

Update APM index pattern bundled with Kibana to reflect following changes:

• Add cloud metadata
• Introduce transaction metrics aggregation

Added fields

    {
        "aggregatable": true,
        "analyzed": false,
        "count": 0,
        "doc_values": true,
        "indexed": true,
        "name": "cloud.account.name",
        "scripted": false,
        "searchable": true,
        "type": "string"
    },
    {
        "aggregatable": true,
        "analyzed": false,
        "count": 0,
        "doc_values": true,
        "indexed": true,
        "name": "cloud.project.name",
        "scripted": false,
        "searchable": true,
        "type": "string"
    },
    {
        "aggregatable": true,
        "analyzed": false,
        "count": 0,
        "doc_values": true,
        "indexed": true,
        "name": "transaction.root",
        "scripted": false,
        "searchable": true,
        "type": "boolean"
    },
    {
        "aggregatable": true,
        "analyzed": false,
        "count": 0,
        "doc_values": true,
        "indexed": true,
        "name": "transaction.duration.histogram",
        "scripted": false,
        "searchable": true
    }
]

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 8d2a063

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream