tenable_io: 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

[elasticmachine]

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Build stats

• Start Time: 2023-07-11T05:47:48.210+0000

• Duration: 17 min 57 sec

Test stats 🧪

Test	Results
Failed	0
Passed	30
Skipped	0
Total	30

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (5/5)	💚
Files	100.0% (5/5)	💚 2.861
Classes	100.0% (5/5)	💚 2.861
Methods	96.721% (59/61)	👍 4.441
Lines	91.573% (2271/2480)	👍 0.432
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[kcreddy]

LGTM

[elasticmachine]

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