This commit applies several optimizations to StringUtils#cleanPath and
related methods:
* pre-size pathElements deque in StringUtils#cleanPath with
pathElements.length elements, since this this is the maximum size and
the most likely case.
* optimize StringUtils#collectionToDelimitedString to calculate the size
of the resulting String and avoid array auto-resizing in the
StringBuilder.
* If the path did not contain any components that required cleaning,
return the (normalized) path as-is. No need to concatenate the prefix
and the trailing path.
See gh-26316
8d3e8ca3a2