[LLVM][PDB] Add missing type/symbol IDs (#182743)
This adds all missing `LF_` and `S_` constants found in
`msdia140.dll`/`mspdbcore.dll`. It doesn't add the record definitions.
Most of them are unknown.
Some definitions would be great to have:
- `LF_{CLASS,STRUCTURE,UNION,INTERFACE}2` The structure is similar to
the versions without `2`. See
https://redirect.github.com/microsoft/microsoft-pdb/issues/50#issuecomment-737890766
and
https://github.com/microsoft/pdb-rs/blob/23def87dfed8cb78dd2916c9607a0caa19e8e549/codeview/src/types/visitor.rs#L518-L523.
We'll probably need to duplicate `ClassRecord` and friends for this.
From the comment, it sounded like MSVC would generate these, but I
haven't been successful in getting it to generate these.
- `S_ASSOCIATION` is generated when compiling C++ 20 coroutines.
- `S_REGREL32_INDIR` (and similar) also generated in C++ 20 coroutines
and for (unoptimized) structured bindings (#34392). Seems to correspond
to
[`LocationType::LocIsRegRelAliasIndir`](https://learn.microsoft.com/en-us/visualstudio/debugger/debug-interface-access/locationtype?view=visualstudio)
([Symbol
Locations](https://learn.microsoft.com/en-us/visualstudio/debugger/debug-interface-access/symbol-locations?view=visualstudio))
from the DIA SDK. If I understand correctly, this is just `S_REGREL32`
except that you'd add `offsetInUDT` to the offset. Example:
```
40000000 13100000 00000000 4F01 5F5F 636F726F 5F667261 6D655F70 74720000
offset | type |off. in | reg| name (0-terminated)
UDT
```
I'm guessing the others are similar, but I don't have any example.
We're also missing some x86 and arm64 sub-registers for XMM/YMM that are
present in `cvconst.h`.
