Investigate alternatives to ported SparseAnalysis

[iangneal]

In this PR: #307, we removed the ported DenseAnalysis since we no longer needed a custom implementation.

The SparseAnalysis was ported for a similar reason, but also has changes to the (non-virtual) visitOperation function so that operations without results (constraints, member writes, etc) are visited.

llzk-lib/lib/Analysis/SparseAnalysis.cpp

Lines 102 to 105 in 67030b1

	LogicalResult AbstractSparseForwardDataFlowAnalysis::visitOperation(Operation *op) {
	/// LLZK: Visit operations with no results, as they may still affect values
	/// (e.g., constraints and assertions).
	/// The MLIR version doesn't visit result-less operations.

We can likely implement this functionality in a different way tnat allows us to remove this port.