[ECS][1password] Correcting invalid ECS field usages at root-level

[kgeller]

What does this PR do?

Correcting invalid ECS os.* field usages at the root-level

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.

Related issues

• Relates Invalid ECS field usages at root-level #7808

[elasticmachine]

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Build stats

• Start Time: 2023-09-25T16:42:04.824+0000

• Duration: 15 min 28 sec

Test stats 🧪

Test	Results
Failed	0
Passed	22
Skipped	0
Total	22

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (3/3)	💚
Files	100.0% (3/3)	💚 5.556
Classes	100.0% (3/3)	💚 5.556
Methods	90.909% (30/33)	👍 4.956
Lines	88.182% (291/330)	👍 2.158
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[taylor-swanson]

LGTM

[elasticmachine]

Package 1password - 1.21.0 containing this change is available at https://epr.elastic.co/search?package=1password