[github] Clean up null handling, formatting

[chrisberkhout]

Proposed commit message

[github] Clean up null handling, formatting (#)

- Remove redundant null-safe operator.
- Make access after null-safe access also be null-safe.
- Make nullable checks boolean.
- Remove redundant quotes.
- Combine 'is null or not contains' 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

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[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 3f8f7d2

History

• 💚 Build #9027 succeeded f1b50ab

cc @chrisberkhout

[elastic-sonarqube]

Quality Gate failed

Failed conditions

62.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube

[elasticmachine]

Package github - 1.27.3 containing this change is available at https://epr.elastic.co/search?package=github