windows: set event.action to the event's sysmon name

[efd6]

What does this PR do?

Sets event.action to the event's sysmon name.

Event details from https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon.

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

• For windows: add support for sysmon 15.0/event 29 #6761 (comment)

Screenshots

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-07-09T23:45:47.381+0000

• Duration: 16 min 59 sec

Test stats 🧪

Test	Results
Failed	0
Passed	129
Skipped	0
Total	129

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (4/4)	💚
Files	87.5% (7/8)	👍
Classes	87.5% (7/8)	👍
Methods	83.696% (77/92)	👍
Lines	92.858% (5188/5587)	👍 0.039
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[elasticmachine]

Package windows - 1.26.0 containing this change is available at https://epr.elastic.co/search?package=windows

[andrewkroh]

Thanks!