### What changes were proposed in this pull request?
This PR proposes to expose the number of total paths in Utils.buildLocationMetadata(), with relaxing space usage a bit (around 10+ chars).
Suppose the first 2 of 5 paths are only fit to the threshold, the outputs between the twos are below:
* before the change: `[path1, path2]`
* after the change: `(5 paths)[path1, path2, ...]`
### Why are the changes needed?
SPARK-31793 silently truncates the paths hence end users can't indicate how many paths are truncated, and even more, whether paths are truncated or not.
### Does this PR introduce _any_ user-facing change?
Yes, the location metadata will also show how many paths are truncated (not shown), instead of silently truncated.
### How was this patch tested?
Modified UTs
Closes#31464 from HeartSaVioR/SPARK-34339.
Authored-by: Jungtaek Lim (HeartSaVioR) <kabhwan.opensource@gmail.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
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