fix(compass-import-export): Picks only specified columns in JSON export COMPASS-4256

[leorossi]

Description

Previously all columns where serialized in JSON (not only _id).
This PR fixes this adding a { columns } parameter to the JSON formatter. If empty it will take all fields.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)