Merge Coalesce Level and Associated Merging Utils

[AdrianGushin]

I might have accidentally messed up the project.toml when I installed acceleratedkernels.

[codecov]

Codecov Report

❌ Patch coverage is 76.40919% with 113 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/tensors/levels/coalesce_levels.jl	65.38%	72 Missing ⚠️
src/util/merging.jl	85.24%	36 Missing ⚠️
src/tensors/levels/dense_levels.jl	0.00%	4 Missing ⚠️
src/tensors/levels/shard_levels.jl	66.66%	1 Missing ⚠️

Files with missing lines	Coverage Δ
src/Finch.jl	91.00% <ø> (ø)
src/tensors/levels/element_levels.jl	87.38% <100.00%> (+0.84%)	⬆️
src/tensors/levels/sparse_list_levels.jl	94.37% <100.00%> (+1.48%)	⬆️
src/tensors/levels/shard_levels.jl	65.57% <66.66%> (+0.25%)	⬆️
src/tensors/levels/dense_levels.jl	84.00% <0.00%> (-2.78%)	⬇️
src/util/merging.jl	85.24% <85.24%> (ø)
src/tensors/levels/coalesce_levels.jl	65.38% <65.38%> (ø)

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