[Akamai] - Migrated SIEM data stream from HTTPJSON to CEL input

[ShourieG]

Type of change

• Enhancement

Proposed commit message

Migrated SIEM data stream from HTTPJSON to CEL input with 
with necessary reworks and working system tests. Updated 
minimum stack version to 8.18 to allow usage of required CEL functions. 

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

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• Closes [Akamai] - Add option for a CEL based agent and integrate automatic error recovery. #11338
• Relates [Akamai] - Add option for a CEL based agent and integrate automatic error recovery. #11338

Screenshots

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: d05fc95

History

• 💔 Build #33054 failed ffd666e
• 💔 Build #33009 failed 175690c

cc @ShourieG

[elasticmachine]

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