[SandboxIR] Implement CallBase and CallInst (#100218)

This patch adds the `CallBase` SandboxIR class and its subclass:
`CallInst`. Both are mirrors of `llvm::CallBase` and `llvm::CallInst`
respectively. Since `llvm::CallBase` contains a large number of member
functions so this patch implements only some of them.

The `CallBase` unit tests uncovered an issue with the class hierarchy,
where `sandboxir::Function` was not a subclass of `sandboxir::Constant`,
so this was fixed.

Testing tracking of the `CallBase` setters showed that
`sandboxir::Use::set()` was not being tracked. So this is also part of
this patch.

0 files changed, 0 insertions, 0 deletions