[cisco_ftd] Null handling and other clean-up

[chrisberkhout]

Proposed commit message

[cisco_ftd] Null handling and other clean-up (#)

- Remove redundant null-safe access to ctx.
- Add space around the conditional operator.
- Remove trailing whitespace.
- Combine 'not null and is value' checks.
- Remove redundant null-safe accesses.
- Combine 'is null or not value' checks.

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 Incorrect null handling in if conditions and elsewhere #8646

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)

[elasticmachine]

🚀 Benchmarks report

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[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: ad55fa4

cc @chrisberkhout

[elastic-sonarqube]

Quality Gate failed

Failed conditions

37.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube

[elasticmachine]

Package cisco_ftd - 3.1.2 containing this change is available at https://epr.elastic.co/search?package=cisco_ftd