fix: fix custom command & args behavior

[travis-cook-sfdc]

Fix two issues with the custom command & args behavior added in #408:

1. Change custom command & args to use toRawJson instead of toJson. Previously, this resulted in special character would be escaped.

For example, this value:

args: [ "source setup.sh && /datahub/datahub-gms/scripts/start.sh" ]

Would get rendered as:

args: [ "source setup.sh \u0026\u0026 /datahub/datahub-gms/scripts/start.sh" ]

Use toRawJson to force special values to not be escaped

2. Add custom command & args to all other containers that do not support it:
   • Datahub cleanup job
   • Datahub Nocode Migration Job
   • Datahub Restore Indices Job
   • Datahub System Update Job
   • Datahub Actions
   • Elastic Search Setup
   • Kafka Setup
   • Mysql Setup
   • Postgres setup

Checklist

• [x] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [x] Links to related issues (if applicable)
• [x] Tests for the changes have been added/updated (if applicable)
• [x] Docs related to the changes have been added/updated (if applicable)