[mlir][spirv] Improve stride support in array types

[mlir][spirv] Improve stride support in array types

This commit added stride support in runtime array types. It also
adjusted the assembly form for the stride from `[N]` to `stride=N`.
This makes the IR more readable, especially for the cases where
one mix array types and struct types.

Differential Revision: https://reviews.llvm.org/D78034