[Fix-16573][alert] SQL task alert sending failed #17941

Job	Run time
Backend-Path-Filter	8s
schema-check-prepare-3.1.9	7s
schema-check-prepare-3.2.0	11s
Backend-Build (8)	11m 14s
Backend-Build (11)	11m 10s
cluster-test-mysql-with-zookeeper-registry	2m 49s
schema-check-with-mysql-3.1.9	1m 33s
cluster-test-mysql-with-mysql-registry	2m 56s
schema-check-with-postgresql-3.1.9	1m 17s
cluster-test-postgresql-zookeeper-registry	2m 50s
schema-check-with-mysql-3.2.0	2m 21s
cluster-test-postgresql-with-postgresql-registry	2m 43s
schema-check-with-postgresql-3.2.0	1m 21s
Build	1s
	40m 41s

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