scylla_coredump_setup: Remove the coredump create by the check

We generate a coredump as part of "scylla_coredump_setup" to verify that
coredumps are working. However, we need to *remove* that test coredump
to avoid people and test infrastructure reporting those coredumps.

Fixes #6159

dist/common/scripts/scylla_coredump_setup

@@ -100,6 +100,12 @@ WantedBy=multi-user.target
         try:
             run('coredumpctl --no-pager --no-legend info {}'.format(pid))
             print('\nsystemd-coredump is working finely.')
+
+            # get last coredump generated by bash and remove it, ignore inaccessaible ones
+            corefile = out('coredumpctl -1 --no-legend dump 2>&1 | grep "bash" | grep "Storage:\|Coredump:" | grep -v "inaccessible"')
+            if corefile:
+                corefile = corefile.split()[-1]
+                run('rm -f {}'.format(corefile))
         except subprocess.CalledProcessError as e:
             print('Does not able to detect coredump, failed to configure systemd-coredump.')
             sys.exit(1)