The find tool previously collected every .gitignore under the search
path and passed them to fd via --ignore-file. fd treats --ignore-file
entries as a single global ignore source, so rules from a/.gitignore
also filtered files under sibling b/.
Drop the manual collection and pass --no-require-git instead, which
makes fd apply hierarchical .gitignore semantics whether or not a git
repo is present.
closes#3303
1d4fdbad26