[BugFix] Add support for weight shape constraints and group size selection in Machete

[Sunny-bot1]

Motivation

In the Machete backend, missing weight shape checks can cause shape-related conversion errors during group-scale quantization.

issue: #4713 (comment)

Modifications

For Machete:

add check_machete_supports_shape to constrain in_features % 64 == 0 and out_features % 128 == 0

add query_machete_supported_group_size to choose group size: if in_features % 128 == 0 -> 128 else 64

Usage or Command

pass

Accuracy Tests

pass

Checklist

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[paddle-bot]

Thanks for your contribution!