[php-src] PR #22975: zip: skip the entry name allocation when there is no add_path

Pull Request: https://github.com/php/php-src/pull/22975 Author: iliaal php_zip_add_file() takes a char*/length pair, so without a prefix to concatenate the entry name was allocated and released once per file only to pass one through. Hand it file_stripped directly, and hold basename until after the call because file_stripped can point into it. Measured on 4000 files with addGlob(): 22.2/22.2/22.8 ms patched against 23.8/22.2/22.1 ms before, so the saving is under the noise of the expand_filepath() and stat() the loop already does per entry. This is about the redundant work, not about a number. Same function as #22973, which is the correctness fix; this one only removes the allocation.