[TTIR] Remove TTIR operand_constraints

[sdjordjevicTT]

Operand constraints don't make sense on a higher-level dialect like TTIR. They are more tied to the backend dialects, hence we should remove all occurrences of all operand_constraints attributes and interfaces.

This issue is part of the TTNN backend pipeline refactor. This doc captures the TTNN backend pipeline refactor:
TTNN Defaults - Design Doc