Merge PR #62228 into main

* refs/pull/62228/head:
	libcephfs: getcwd after chdir for API constraint
	client: unwrap dentries for getcwd
	client: refactor / optimize chdir
	test/libcephfs: test getcwd with case insensitive dir
	test/libcephfs: refactor ManyNestedDirs
	include/filepath: add iterators for components

Reviewed-by: Venky Shankar <vshankar@redhat.com>

diff --cc src/client/Client.cc
Simple merge

diff --cc src/client/Client.h
Simple merge