[cisco_umbrella] Add system tests for aws-s3 input and fix fields

[bhapas]

Proposed commit message

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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 [Meta][aws-s3] Add system tests for integrations that use aws-s3 input #7034

Local testing

Need to add AWS credentials as env variables to be able to test this against AWS instance

export AWS_ACCESS_KEY_ID=<aws_access_key_id>
export AWS_SECRET_ACCESS_KEY=<aws_secret_access_key>
export AWS_SESSION_TOKEN=<aws_session_token>

[elasticmachine]

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Build stats

• Start Time: 2023-11-03T10:01:59.202+0000

• Duration: 20 min 55 sec

Test stats 🧪

Test	Results
Failed	0
Passed	11
Skipped	0
Total	11

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

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚
Classes	100.0% (1/1)	💚
Methods	100.0% (21/21)	💚
Lines	95.027% (535/563)	👎 -0.451
Conditionals	100.0% (0/0)	💚

[efd6]

LGTM mod nit.

[bhapas]

/test

[elasticmachine]

Package cisco_umbrella - 1.20.1 containing this change is available at https://epr.elastic.co/search?package=cisco_umbrella