[3.13] gh-121973: Fix flaky test_pyrepl tests (GH-122140) (GH-122173)

This fixes the flakiness in:
* test_inspect_keeps_globals_from_inspected_file
* test_inspect_keeps_globals_from_inspected_module

The output already includes newlines. Adding newlines for every entry in
the output list introduces non-determinism because it added '\n' in
places where stdout is flushed or some buffer becomes full.

The regex also needed to be updated because pyrepl includes control
characters -- the visible output on each line doesn't immediately follow
a newline character.

(cherry picked from commit 2c1b1e7a07eba0138b9858c6f2bea3cae9af0808)

Co-authored-by: Sam Gross <colesbury@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>