[clang-format] Add case aware include sorting.

Adds an option to [clang-format] which sorts headers in an alphabetical manner using case only for tie-breakers. The options is off by default in favor of the current ASCIIbetical sorting style.

Reviewed By: MyDeveloperDay, curdeius, HazardyKnusperkeks

Differential Revision: https://reviews.llvm.org/D95017

GitOrigin-RevId: a8105b3766e4195ca2390cd0714e07406bc8a4a5
1 file changed