Migrate SparseTensor commandline options to enums

[wrengr]

The SparseTensor passes currently use opaque numbers for the CLI, despite using an enum internally. So we should expose the enum names to the CLI. (See D117919 for slightly more discussion.)

[llvmbot]

@llvm/issue-subscribers-mlir-sparse

[llvmbot]

@llvm/issue-subscribers-mlir-llvm

[nkreeger]

Patch here: https://reviews.llvm.org/D123876

[nkreeger]

Fixed in 30ceb78