[clang] [clang-format] Add option to remove leading blank lines (PR #91221)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `premerge-monolithic-windows` running on `premerge-windows-1` while building `clang` at step 7 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/35/builds/338

Here is the relevant piece of the build log for the reference:
```
Step 7 (build-unified-tree) failure: build (failure)

```

https://github.com/llvm/llvm-project/pull/91221