Ksql Logs not generating in ksql.log.dir

Ksql is not writing the main ksql logs in the LOG_DIR. Confluent version used 5.3.0

```
# grep LOG_DIR ksql-server-start
LOG_DIR="/apps/logs/ksql"
# ls -lrt /apps/logs/ksql/
total 24
-rw-rw-r--. 1 kadmin kadmin 6952 Nov 21 13:45 ksql-server-gc.log.0.current
```
I see the gc logs but no other logs are generating their. I am starting the ksql as systemmd process and the service please find the service file below. ( even i tried giving the LOG_DIR in the env variable still its not working)
```
[Unit]
Description=Apache Ksql
Documentation=http://kafka.apache.org/documentation.html
Requires=network.target remote-fs.target
After=network.target remote-fs.target autofs.target zookeeper.target kafka.target schema-registry.target

[Service]
Type=simple
User=kadmin
Group=kadmin
Environment="LOG_DIR=/apps/logs/ksql"
ExecStart=/apps/kafka/bin/ksql-server-start /apps/kafka/etc/ksql/ksql-server.properties
ExecStop=/apps/kafka/bin/ksql-server-stop
TimeoutStopSec=180
Restart=no

[Install]
WantedBy=multi-user.target

```

Start with the ksql-server-start script and the supplied systemd service definition, then inspect how LOG_DIR is passed when launching ksql-server.properties. Reproduce the service startup and compare the generated ksql-server-gc.log with the missing main log; done means identifying the cause and documenting or verifying the expected log location.

Written by the indexing model from the issue text.