[llvm] annotate interfaces in Passes for DLL export

[andrurogerz]

Purpose

This patch is one in a series of code-mods that annotate LLVM’s public interface for export. This patch annotates the llvm/Passes library and other pass-related headers. These annotations currently have no meaningful impact on the LLVM build; however, they are a prerequisite to support an LLVM Windows DLL (shared library) build.

Background

This effort is tracked in #109483. Additional context is provided in this discourse, and documentation for LLVM_ABI and related annotations is found in the LLVM repo here.

The bulk of these changes were generated automatically using the Interface Definition Scanner (IDS) tool, followed formatting with git clang-format.

The following manual adjustments were also applied after running IDS on Linux:

• Remove the redundant declaration of the initializeKCFIPass function from llvm/include/llvm/InitializePasses.h because IDS only auto-annotates the first declaration it encounters, and the second un-annotated declaration results in an MSVC warning
• Add LLVM_ABI to a number of private AnalysisKey fields in classes that extend the AnalysisInfoMixin template class.
• Add LLVM_ABI to the ChangeReporter and TextChangeReporter template class definitions in llvm/include/llvm/Passes/StandardInstrumentations.h and remove the extern template instantiations. This is the only way I've found to get everything compiling warning-free when building a DLL because both template classes have methods implemented out-of-line.

Validation

Local builds and tests to validate cross-platform compatibility. This included llvm, clang, and lldb on the following configurations:

• Windows with MSVC
• Windows with Clang
• Linux with GCC
• Linux with Clang
• Darwin with Clang

[andrurogerz]

@compnerd, @vgvassilev another one for review when you get a chance, thanks!

[vgvassilev]

Lgtm!