* Quiet verbosity provides just the test names
* Normal verbosity adds tags
* High verbosity add the source location of the tests
Listing tests with the quiet verbosity results in about 1/4 of the
previous output, which leads to measurably faster execution of
`catch_discover_tests` when it does not need tags for labels.
(If it does need tags, the output is about 1/2 of previous).
Martin Hořeňovský
4cde128517