selftests: ublk: fix recover test

When adding recovery test:

- 'break' is missed for handling '-g' argument

- test name of test_generic_05.sh is wrong

So fix the two.

Fixes: 57e13a2e ("selftests: ublk: support user recovery")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Uday Shankar <ushankar@purestorage.com>
Link: https://lore.kernel.org/r/20250421235947.715272-2-ming.lei@redhat.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>