[etcd] Fix incorrect field mapping in leader dataset

[agithomas]

• Bug

Proposed commit message

Fix the field mappings under leader datastream

Please explain:

The field mapping of the leader datastream is incorrect.
This change fixes the incorrect field mapping.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Author's Checklist

• elastic-package build
• elastic-package stack up -v -d --services package-registry

How to test this PR locally

• Verification of field mappings after the change

Related issues

• Closes [etcd] Incorrect leader field definitions #8373

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• Start Time: 2023-11-07T10:02:29.341+0000

• Duration: 16 min 48 sec

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[agithomas]

New mapping details are below

  "etcd": {
        "properties": {
          "api_version": {
            "type": "keyword",
            "ignore_above": 1024
          },
          "leader": {
            "properties": {
              "follower": {
                "properties": {
                  "failed_operations": {
                    "type": "long"
                  },
                  "id": {
                    "type": "keyword",
                    "ignore_above": 1024
                  },
                  "latency": {
                    "properties": {
                      "ms": {
                        "type": "scaled_float",
                        "scaling_factor": 1000
                      }
                    }
                  },
                  "leader": {
                    "type": "keyword",
                    "ignore_above": 1024
                  },
                  "success_operations": {
                    "type": "long"
                  }
                }
              }
            }
          }
        }
      },

[ritalwar]

LGTM!

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Package etcd - 0.6.1 containing this change is available at https://epr.elastic.co/search?package=etcd