Support LIST of different active states throughout policy objects

[jakedoublev]

Background

Soft-delete/deactivation was added for Attributes, Namespaces, and Attribute Values in opentdf/platform#108 & opentdf/platform#96. The tructl CLI should have support for flags on LIST of those three Objects to filter by state active, inactive, or any, with active as the default fallback.

Acceptance Criteria

1. a familiar flag convention is employed to filter LIST calls by active state
2. that flag convention is consumed when LISTing Namespaces, Attribute Definitions, and Attribute Values in RPCs
3. the helper flag -h should clarify that active is the default filter applied with no flags provided, which is the default behavior serverside