Add audit and system logs

[bhapas]

What does this PR do?

This PR enhances Barracuda Integration with System and Audit logs

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.

How to test this PR locally

Related issues

• Relates Barracuda WAF #1302

Screenshots

Audit Logs

System Logs

[elasticmachine]

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

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-03-30T12:01:14.303+0000

• Duration: 17 min 35 sec

Test stats 🧪

Test	Results
Failed	0
Passed	18
Skipped	0
Total	18

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (6/6)	💚
Classes	100.0% (6/6)	💚
Methods	100.0% (36/36)	💚 33.333
Lines	96.597% (369/382)	👍 2.411
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package barracuda - 1.1.0 containing this change is available at https://epr.elastic.co/search?package=barracuda