[clang] [clang-repl] Extend the C support. (PR #89804)

[Jason Molenda via cfe-commits]

jasonmolenda wrote:

I reverted in 
```
commit dfdf1c5fe45a82b9c578306f3d7627fd251d63f8
Author: Jason Molenda <jmolenda at apple.com>
Date:   Tue May 21 18:00:11 2024 -0700

    Revert "[clang-repl] Extend the C support. (#89804)"
    
    This reverts commit 253c28fa829cee0104c2fc59ed1a958980b5138c.
```

to unblock the CI bots until Vassil has a chance to look at it.

https://github.com/llvm/llvm-project/pull/89804