azure: fix mappings for azure.activitylogs.claims.*

[efd6]

What does this PR do?

See title.

After the change the index template shows this (cf.):

      "dynamic_templates": [
        {
          "azure.activitylogs.identity.claims.*": {
            "path_match": "azure.activitylogs.identity.claims.*",
            "mapping": {
              "type": "keyword"
            }
          }
        },
        {
          "strings_as_keyword": {
            "match_mapping_type": "string",
            "mapping": {
              "ignore_above": 1024,
              "type": "keyword"
            }
          }
        }
      ],

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

• [ ]

How to test this PR locally

Related issues

• Closes [azure.activity_logs] Missing object_type on 'azure.activitylogs.identity.claims.*' #7974

Screenshots

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• Start Time: 2023-09-26T04:41:46.130+0000

• Duration: 13 min 20 sec

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Failed	0
Passed	83
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Total	83

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (10/10)	💚
Files	86.364% (19/22)	👎 -13.636
Classes	86.364% (19/22)	👎 -13.636
Methods	83.333% (155/186)	👎 -9.438
Lines	85.003% (2817/3314)	👎 -6.638
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[andrewkroh]

LGTM

Contextual comment on this PR -- This field is defined to satisfy elastic-package's validation that all fields are documented. Otherwise, we would not add this at all and defer to the existing strings_as_keyword dynamic mapping.

[zmoog]

LGTM

[elasticmachine]

Package azure - 1.5.32 containing this change is available at https://epr.elastic.co/search?package=azure