Use the C++ VOMS clients

They are faster and they provide a easier-to-use standalone voms-proxy-fake.
Moreover the Java clients have some issues at the moment and its equivalent
of voms-proxy-fake doesn't work well.

.devcontainer/library-scripts/provide-dev-deps.sh

@@ -32,4 +32,4 @@ dnf install -y --setopt=tsflags=nodocs \
     rpmdevtools \
     rpmlint \
     cpan \
-    voms-clients-java
\ No newline at end of file
+    voms-clients-cpp
\ No newline at end of file

docker/library-scripts/provide-deps.sh

@@ -34,5 +34,5 @@ dnf -y install \
     perl-Test-Nginx \
     perl-Digest-SHA \
     cpan \
-    voms-clients-java \
+    voms-clients-cpp \
     procps-ng