MLBEDSW-10632: [MLCE] Improve weight format selection using op perf
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Weight format selection now considers op cycle cost, making Sparse2_4 more likely to be chosen when it yields real performance gains.
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Modified part kernel branch in EstimateConvCycles to account for Sparse2_4.
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Updated EstimateOpPerformance to include weight format.
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Removed EstimateOpPerformanceForSparsity, as it is no longer needed.
Signed-off-by: Johan Alfvén johan.alfven@arm.com Change-Id: Iaa804567bd7f95895ae5ea9524c35479a3854aef