Preparation for JIT\Regression test merging - assembly/file renames (#79489)

Preparation for JIT\Regression test merging - assembly/file renames (#79489)

This is a collection of renames that can be merged independently of actual test merging.  Automated changes were done with the ILTransform tool (started by @trylek, my version at https://github.com/markples/utils/tree/for-PR-dotnet-runtime-79489, commit 131b3764).

- ILTransform -p
    - Standardize project suffixes since _d, etc., are special cases for test merging but -dbg is not
    - Rename a few tests where the project and IL files had CaSiNg differences
- ILTransform -ilfile
    - Rename IL files to match the .ilproj root name (which excludes suffixes such as _d)
    - Update the project files to refer to the new filenames using $(MSBuildProjectName) except src/tests/JIT/Regression/CLR-x86-JIT/V2.0-Beta2/b323557 where the IL file doesn't have the suffix
- ILTransform -m
    - Remove all .module (including extern) lines from IL files
- ILTransform -a
    - Rename IL .assembly names to match their filenames
    - Some lines were `.assembly foo // as "foo"` - remove those comments too
- ILTransform -n -a -ilfile
    - Deduplicate project names across JIT/Regression
        - If a set of duplicates is simply one csproj and one ilproj, then add _il to the ilproj and leave the csproj alone
        - Otherwise append the difference in the closest different directory names.  For example:
            - V1-M11-Beta1/b40347/b40347.ilproj -> b40347_M11-Beta1.ilproj
            - V1-M12-Beta2/b40347/b40347.ilproj -> b40347_M12-Beta2.ilproj
        - However, avoid creating foo_foo.  For example:
            - V1-M12-Beta2/b51875/b51875.csproj -> <unchanged>
            - V1-M12-Beta2/b51875/Desktop/b51875.csproj -> b51875_Desktop.csproj
    - Also rename IL files and .assembly names to match the new project names
- Manual fixes for IL->C# assembly references in tests dev11_132534 and dev11_145295