Bulk rename of the antipattern across 19 test files (136 occurrences).
.no_output() is the established shorthand in the uutests framework
for asserting both empty stdout and empty stderr.
When the spec contains '.' but no ':', emit a warning matching GNU
coreutils behavior and re-parse with '.' as separator so both owner
and group are applied.
Closes#11352
* Display a message when the owner is not changed.
* Display a message when the current user/group doesn't match those specified in the `--from` args.
* print messages to stdout
* Show the message "ownership of 'foo' retained as 'bar'" for every path entry when `chown -v -R --from=`
* fix chown tests: test stdout and not stderr
* factorize duplicate code in a function
* Display a message when the owner is not changed.
* Display a message when the current user/group doesn't match those specified in the `--from` args.
* print messages to stdout
* Show the message "ownership of 'foo' retained as 'bar'" for every path entry when `chown -v -R --from=`
* fix chown tests: test stdout and not stderr
* factorize duplicate code in a function
* display the retained ownership details according to the destination ownership.
* print the message "failed to change ownership of" when we try to change a non existing file.
* replace the 4-tuple returned by parse_gid_uid_and_filter by GidUidOwnerFilter struct.
* chain the test in one expression.
* chown: remove unused var "result" in test
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Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>