github: convert visualisations to lens

[efd6]

What does this PR do?

See title.

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 Serverless - Migrate integration dashboards to Lens #6787

Screenshots

Only two dashboards have conversions: User Change Audit (2×) and Audit Log Activity (6×)

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-07-10T02:09:41.510+0000

• Duration: 17 min 14 sec

Test stats 🧪

Test	Results
Failed	0
Passed	34
Skipped	0
Total	34

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (5/5)	💚
Files	100.0% (5/5)	💚
Classes	100.0% (5/5)	💚
Methods	100.0% (64/64)	💚
Lines	93.815% (986/1051)	👎 -1.154
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[elasticmachine]

Package github - 1.16.0 containing this change is available at https://epr.elastic.co/search?package=github