Don't fail the build if we cant run `apt clean` (#16510)
Don't fail the build if we cant run `apt clean` (#16510)

I just had a build fail with this:

```
E: Could not get lock /var/cache/apt/archives/lock. It is held by
process 53088 (unattended-upgr)
E: Unable to lock directory /var/cache/apt/archives/
```

That is not a fatal error, and we should just continue
cfei18/incubator-airflow,Acehaidrey/incubator-airflow,dhuang/incubator-airflow,cfei18/incubator-airflow,apache/airflow,apache/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,dhuang/incubator-airflow,cfei18/incubator-airflow,apache/airflow,bolkedebruin/airflow,bolkedebruin/airflow,nathanielvarona/airflow,bolkedebruin/airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,apache/airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,cfei18/incubator-airflow,lyft/incubator-airflow,dhuang/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,apache/airflow,mistercrunch/airflow,apache/incubator-airflow,apache/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,Acehaidrey/incubator-airflow,apache/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,dhuang/incubator-airflow,lyft/incubator-airflow,bolkedebruin/airflow,cfei18/incubator-airflow,apache/incubator-airflow,apache/airflow,nathanielvarona/airflow,mistercrunch/airflow