Remove canceled bgw jobs from test output

When a background worker is canceled by 'select delete_job()' the
following log message is printed:

NOTICE:  cancelling the background worker for job

However, this log message is not deterministic and breaks our CI checks.
So, this patch removes the log message from the test output to make the
regression checks more deterministic.

test/runner.sh

@@ -140,4 +140,5 @@ ${PSQL} -U ${TEST_PGUSER} \
                -e 's! Memory Usage: [0-9]\{1,\}kB!!' \
                -e 's! Average  Peak Memory: [0-9]\{1,\}kB!!' | \
           grep -v 'DEBUG:  rehashing catalog cache id' | \
-          grep -v 'DEBUG:  compacted fsync request queue from'
+          grep -v 'DEBUG:  compacted fsync request queue from' | \
+          grep -v 'NOTICE:  cancelling the background worker for job'

test/runner_shared.sh

@@ -88,4 +88,5 @@ ${PSQL} -U ${TEST_PGUSER} \
                -e 's! Memory Usage: [0-9]\{1,\}kB!!' \
                -e 's! Average  Peak Memory: [0-9]\{1,\}kB!!' | \
           grep -v 'DEBUG:  rehashing catalog cache id' | \
-          grep -v 'DEBUG:  compacted fsync request queue from'
+          grep -v 'DEBUG:  compacted fsync request queue from' | \
+          grep -v 'NOTICE:  cancelling the background worker for job'