[3.12] gh-129363: Change regrtest sequential mode output (GH-129476) (#130406)

gh-129363: Change regrtest sequential mode output (GH-129476)

First, write the test name without color. Then, write the test name
and the result with color. Each test is displayed twice.
(cherry picked from commit f1b81c408fb83beeee519ae4fb9d3a36dd4522b3)

Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>