Tenable IO: add max_executions to asset, audit, plugin, and scan data streams

[chemamartinez]

Proposed commit message

[tenable_io] Add configurable max_executions to asset, audit, plugin, and scan data streams

The max_executions parameter was only exposed in the Fleet UI for the
vulnerability data stream. The asset, audit, plugin, and scan streams
all use CEL inputs with paginated API calls that can exceed the default
limit of executions under sufficient data volume, causing them to go
DEGRADED.

This change brings those streams to parity with vulnerability
by exposing the same optional parameter (default: 2000) in both the
manifest and the CEL template for each affected data stream.

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.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

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[infra-vault-gh-plugin-prod]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[elastic-vault-github-plugin-prod]

✅ All changelog entries have the correct PR link.

[vera-review-bot]

⚠️ @chemamartinez I couldn't complete the review for commits 7d47185 after several attempts. A maintainer can re-run it with @vera-review-bot review.

[elastic-vault-github-plugin-prod]

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• Commit: 7d47185

cc @chemamartinez

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Package tenable_io - 4.12.0 containing this change is available at https://epr.elastic.co/package/tenable_io/4.12.0/