Auto merge of #88629 - wesleywiser:fix_debuginfo_for_scalarpair_params, r=oli-obk

Fix debuginfo for parameters passed via the ScalarPair abi on Windows

Mark all of these as locals so the debugger does not try to interpret
them as being a pointer to the value. This extends the approach used
in #81898.

Fixes #88625

diff --cc compiler/rustc_codegen_ssa/src/mir/mod.rs
Simple merge