Update Parseable Helm Chart

[AdheipSingh]

Description

• Commenting the S3 env configs, as they get deployed as empty strings, and server takes those into consideration
• Default should be commented off.
• Added RUST_LOG to get logs for server
• update Dockerfile rust version
• Added security context

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This PR has:

• been tested to ensure log ingestion and log query works.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added documentation for new or modified features or behaviors.