[llvm] [GISel][RISCV]Implement indirect parameter passing for large scalars (PR #95429)

[Gábor Spaits via llvm-commits]

spaits wrote:

I have made some huge changes to the code to use more of the already existing logic. Now that case is handled, when the reference used for indirect parameter passing is on the stack. There are also new test cases for this.

https://github.com/llvm/llvm-project/pull/95429