[3.12] gh-107237: Fix test_udp_reconnection() of test_logging (GH-107238) (#107242)

gh-107237: Fix test_udp_reconnection() of test_logging (GH-107238)

test_logging: Fix test_udp_reconnection() by increasing the timeout
from 100 ms to 5 minutes (LONG_TIMEOUT).

Replace also blocking wait() with wait(LONG_TIMEOUT) in
test_output() to prevent the test to hang.
(cherry picked from commit ed082383272c2c238e364e9cc83229234aee23cc)

Co-authored-by: Victor Stinner <vstinner@python.org>