Unable to run integration tests if Ubuntu 20.10 host

Ubuntu 20.10 has glibc 2.32 and ClickHouse built in a plain way has two symbols marked GLIBC_2.32,
namely
 
```
 ilejn@ilejn-Latitude-5400:~/projects/ClickHouse/build$ objdump -T ./programs/clickhouse | grep GLIBC_2.32
 0000000000000000      DF *UND*  0000000000000000  GLIBC_2.32  pthread_sigmask
 0000000000000000      DF *UND*  0000000000000000  GLIBC_2.32  pthread_getattr_np
```