[clang] [clang-tools-extra] [Clang] Use TargetInfo when deciding is an address space is compatible (PR #115777)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> I'm not sure what unrelated code you're saying would need to pulled into a .cpp file. It looks like there's only one actual call to `TI.isAddressSpaceSupersetOf`, so if you just pass around an `ASTContext &` to that point, nothing else will need to drill into it. And frankly that entire expression in `Qualifiers::isAddressSpaceSupersetOf` after the equality check is so unwieldy that it probably ought to have been pulled into a .cpp file a long time ago.

The checks for ` bool isMoreQualifiedThan` in `clang/include/clang/AST/CanonicalType.h`. This is included by `ASTContext.h` and doesn't have a `.cpp` file so I'd need to find somewhere to put it.

https://github.com/llvm/llvm-project/pull/115777