Rollup merge of #120518 - kxxt:riscv-split-debug-info, r=compiler-errors

riscv only supports split_debuginfo=off for now

Disable packed/unpacked options for riscv linux/android. Other riscv targets already only have the off option.

The packed/unpacked options might be supported in the future. See upstream issue for more details:
llvm/llvm-project#56642

Fixes #110224

Author: matthiaskrgr