[trendmicro] Add better ECS categorization for event.type and event.category

[kgeller]

Proposed commit message

The trendmicro integration had very general and conflicting ECS categorization values for event.category and event.type respectively. This updates them to be more specific.

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

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Related issues

• Relates trendmicro: enhance ecs mappings for event.category and event.type #8631

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• Start Time: 2023-12-11T14:26:39.210+0000

• Duration: 17 min 30 sec

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	22.222% (2/9)	❕
Classes	22.222% (2/9)	❕
Methods	31.818% (14/44)	❕
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[kcreddy]

LGTM 👍🏼 . Minor suggestion

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Package trendmicro - 1.8.3 containing this change is available at https://epr.elastic.co/search?package=trendmicro