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

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

@sstwcw Please don't ignore the presubmit, it detected issue before merging:

Some checks were not successful
2 skipped, 65 successful, 48 failing, and 3 pending checks

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