#17536: add matmul output mem config validation

[bbradelTT]

Ticket

Link to Github Issue #17536

Problem description

• upstream users need to know whether output memory configs are valid or not

What's changed

• add checks for output memory config
• add a note about it
• fix tests/models to pass in output memory config with no shard spec instead of shard spec of input tensor to avoid incorrect comparison

Checklist

• All post commit CI passes
• Blackhole Post commit CI passes (if applicable)
• Model regression CI passes (if applicable) https://github.com/tenstorrent/tt-metal/actions/runs/13704407729
• Device performance regression CI passes (if applicable) https://github.com/tenstorrent/tt-metal/actions/runs/13704405318/job/38329076330 fails the same way as main https://github.com/tenstorrent/tt-metal/actions/runs/13702886135/job/38323809298
• (For models and ops writers) Full new models tests CI passes (if applicable)
• New/Existing tests provide coverage for changes