[mlir][vector] Add support for vector.maskedstore sub-type emulation. (#73871)

The idea is similar to vector.maskedload + vector.store emulation. What
the emulation does is:

1. Get a compressed mask and load the data from destination.
2. Bitcast the data to original vector type.
3. Select values between `op.valueToStore` and the data from load using
original mask.
4. Bitcast the new value and store it to destination using compressed
masked.