sanity.external fails on ppc64le_linux with exit code 132

Example from https://ci.adoptium.net/job/Test_openjdk11_hs_sanity.external_ppc64le_linux/9/console

```
12:38:36 [exec] ERROR: failed to solve: process "/bin/sh -c apt-get update \t&& apt-get install -qq -y --no-install-recommends software-properties-common \t&& apt-get install -qq -y --no-install-recommends gnupg \t&& add-apt-repository ppa:ubuntu-toolchain-r/test \t&& apt-get update \t&& apt-get install -y --no-install-recommends ant-optional maven git wget tar \t&& rm -rf /var/lib/apt/lists/*" did not complete successfully: exit code: 132
12:38:36
```

Start with the linked Test_openjdk11_hs_sanity.external_ppc64le_linux/9 console output and inspect the failing external-test setup command containing apt-get and /bin/sh. Trace that setup in the aqa-tests test infrastructure, then verify that sanity.external completes successfully on ppc64le_linux without exit code 132.

Written by the indexing model from the issue text.