HPCC-33150 Avoid padding logical files with empty parts

[jakesmith]

When targeting a cluster/plane that was wider than the Thor instance, Thor used to ensure the target file width matched the width of the target cluster (or plane), by in part, creating empty physical files.
This behaviour becomes more common in a containerized world, where the target plane is normally the default data plane with a width that doesn't relate to a Thor instance.

Turn off this behaviour by default, allow it to be re-enabled in configuration or on a per output basis as a fail-safe.

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[github-actions]

Jira Issue: https://hpccsystems.atlassian.net//browse/HPCC-33150

Jirabot Action Result:
Assigning user: [email protected]
Workflow Transition To: Merge Pending
Updated PR