FIXES ISSUE #827: Improve Zclsd Constraint Visibility Outside of operation() Function

[omsuneri]

this PR resolves issue #827 by moving the Zclsd constraint from the operation() function to the instruction-level definedBy field in c.ld.yaml, improving visibility for downstream tools such as disassemblers that do not evaluate operation() logic

why not used the suggested schema format?

definedBy:
  RV32:
    name: Zclsd
  RV64:
    anyOf:
      - name: C
      - name: Zca

This format is not valid under the current inst_schema.json constraints. Specifically, definedBy only supports string, anyOf, allOf, oneOf, or not constructs based on requires_entry, and does not allow architecture-specific keys like RV32 or RV64 So this approach had to be adapted within the allowed schema

[omsuneri]

@ThinkOpenly please review the changes and if you want me to follow the suggested format thats in your comment please ask me to do i ll try to update the schema_defs.json.

[dhower-qc]

Thanks! This is a great suggestion. So good, in fact, that it is being enabled by #891 😄.

Once 891 is in main, we can make the change.