ci: drop libunwind-dev from test-deps image - conflicts with libunwind-14-dev

publish-test-deps-image run 26537414820 failed:
  libunwind-14-dev : Conflicts: libunwind-dev

clang pulls libunwind-14-dev in transitively. If libnice actually needs
libunwind it can use libunwind-14-dev, not the unversioned package.

Author: aidangarske

docker/wolfprovider-test-deps/Dockerfile

@@ -81,8 +81,7 @@ RUN apt-get update \
         check apache2-dev acl attr fakeroot \
         asciidoctor docbook-xsl pandoc xsltproc man2html \
         memcached vsftpd pps-tools tshark \
-        # static-analysis (infer needs opam) + libnice (libunwind-dev)
-        opam libunwind-dev \
+        opam \
     && rm -rf /var/lib/apt/lists/*
 
 # Perl modules used by app test suites. Baked in so transient CPAN