gitlab: fix null check condition and field type for production data stream

[chemamartinez]

Proposed commit message

Fixing two issues for the production data stream:
- Fix a pipeline error when url.path is null.
- Update the type for params.variables fields from
  keyword to flattened, this change avoids an ingestion
  error when the field contains an object.

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

[elasticmachine]

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

[efd6]

/test

[elastic-vault-github-plugin-prod]

🚀 Benchmarks report

Package gitlab 👍(3) 💚(0) 💔(4)

Expand to view

Data stream	Previous EPS	New EPS	Diff (%)	Result
audit	7042.25	4694.84	-2347.41 (-33.33%)	💔
auth	8403.36	5747.13	-2656.23 (-31.61%)	💔
pages	20408.16	10752.69	-9655.47 (-47.31%)	💔
sidekiq	13513.51	8771.93	-4741.58 (-35.09%)	💔

To see the full report comment with /test benchmark fullreport

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 99106bb

History

• 💚 Build #28185 succeeded f2c5bfb
• 💔 Build #28122 failed 59d0f6b
• 💔 Build #28099 failed 59d0f6b

cc @chemamartinez

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[elastic-vault-github-plugin-prod]

Package gitlab - 2.3.2 containing this change is available at https://epr.elastic.co/package/gitlab/2.3.2/