[clang] [clang] Fix-it hint for `++this` -> `++*this` when deref is modifiable (PR #94159)

[Rajveer Singh Bharadwaj via cfe-commits]

Rajveer100 wrote:

I have done the last few changes as well.

Regarding the force-push, I will try to do single commits and later squash them!

https://github.com/llvm/llvm-project/pull/94159