[clang] [llvm] Fix Windows EH IP2State tables (remove +1 bias) (PR #144745)

[via llvm-commits]

sivadeilra wrote:

@jansvoboda11 Can you verify that this change:

```
// RUN: %clang_cl -c --target=x86_64-windows-msvc /EHs-c- -O2 /GS- \
// RUN:   -Xclang=-import-call-optimization \
// RUN:   /clang:-S /clang:-o- -- %s 2>&1 \
// RUN:   | FileCheck %s
```

(inserting `--` before `%s`) fixes the problem for you?  I will submit a PR for fixing this, along with a fix for an AArch64 test.

https://github.com/llvm/llvm-project/pull/144745