Since #189401, LLVM and Clang generate `S_DEFRANGE_REGISTER_REL_INDIR`
for indirect locations. This adds support in LLDB.
The offset added after dereferencing is signed here - unlike in
`S_REGREL32_INDIR` (at least that's the assumption). So I updated
`MakeRegisterBasedIndirectLocationExpressionInternal` to handle the
signedness. This is the reason the MSVC test was changed here.
I didn't find a test case where LLVM emits the record with the `VFRAME`
register. Other than that, the clang test is similar to the MSVC one
except that the locations are slightly different.
a2c9146da1