helm fixes for distributed mode

[AdheipSingh]

Fixes #XXXX.

Description

• For Standalone local mode

helm upgrade --install parseable . -n parseable --set "parseable.store=local-store"  --set "parseable.localModeSecret.enabled=true"

• For Standalone S3 mode

helm upgrade --install parseable . -n parseable --set "parseable.store=s3-store"  --set "parseable.s3ModeSecret.enabled=true"

• For HA S3 mode

helm upgrade --install parseable . -n parseable --set "parseable.store=s3-store" --set "parseable.highAvailability.enabled=true" --set "parseable.s3ModeSecret.enabled=true"

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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.