[clang-format] Fix clang-format issue with 'new' and 'delete' keywords in C files (#85470)

This resolves an issue in clang-format where `new` and `delete` were
incorrectly formatted as keywords in C files. The fix modifies
`TokenAnnotator::spaceRequiredBetween` to handle `new` and `delete` when
used as identifiers for function pointers in structs in C code.