[clang] [clang-tools-extra] Remove clang-rename (PR #108988)

[via cfe-commits]

cor3ntin wrote:

Also these bazel build scripts

```
llvm/utils/gn/secondary/clang-tools-extra/test/BUILD.gn:    "//clang/tools/clang-rename",
llvm/utils/gn/secondary/clang/test/BUILD.gn:    "//clang/tools/clang-rename",
llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn:executable("clang-rename") {
utils/bazel/llvm-project-overlay/clang/BUILD.bazel:    "tools/clang-rename/clang-rename.el",
utils/bazel/llvm-project-overlay/clang/BUILD.bazel:    name = "clang-rename",
utils/bazel/llvm-project-overlay/clang/BUILD.bazel:    srcs = glob(["tools/clang-rename/*.cpp"]),
```

https://github.com/llvm/llvm-project/pull/108988