ci(opensuse): install zstd as that is the configured compression method

Commit eada0fb exposed that even though openSUSE configures zstd
compression, it is not installed in the CI container.

This commit eliminates the following warning during tests

```
dracut[E]: Cannot execute compression command 'zstd -3 -T0 -q', falling back to default
```

diff --git a/test/container/Dockerfile-opensuse b/test/container/Dockerfile-opensuse
index 0217478823ce588aab0a38372a1fffd75b76a8af..91988fd53468a835cb996cfbeb78c01232657e83 100644 (file)
--- a/test/container/Dockerfile-opensuse
+++ b/test/container/Dockerfile-opensuse
@@ -7,6 +7,7 @@
 # - rdma out of tree dracut module
 # - dbus-broker
 # - network: network-legacy, network-manager
+# - zstd compression
 
 FROM registry.opensuse.org/opensuse/tumbleweed:latest
 
@@ -55,6 +56,7 @@ RUN zypper --non-interactive install --no-recommends \
     tpm2.0-tools \
     util-linux-systemd \
     xorriso \
+    zstd \
     && zypper --non-interactive dist-upgrade --no-recommends
 
 # workaround for openSUSE on arm64