install_builder_prerequisites failed after recent Helios upgrade

Instead of always trying to install {gcc,g++}-runtime version 13,
update them to the latest if they are not new enough to support
the pre-compiled illumos clickhouse binaries.

Fixes #7292

tools/install_builder_prerequisites.sh

@@ -138,22 +138,26 @@ function install_packages {
     fi
   elif [[ "${HOST_OS}" == "SunOS" ]]; then
     CLANGVER=15
-    RTVER=13
     PGVER=13
     packages=(
       "pkg:/package/pkg"
       "build-essential"
       "library/postgresql-$PGVER"
       "pkg-config"
       "library/libxmlsec1"
-      "system/library/gcc-runtime@$RTVER"
-      "system/library/g++-runtime@$RTVER"
       # "bindgen leverages libclang to preprocess, parse, and type check C and C++ header files."
       "pkg:/ooce/developer/clang-$CLANGVER"
       "system/library/gcc-runtime"
       "system/library/g++-runtime"
     )
 
+    # The clickhouse binary depends on the {gcc,g++}-runtime packages being
+    # at least version 13.
+    RTVER=13
+    for p in system/runtime/gcc-runtime system/runtime/g++-runtime; do
+	    [[ $(pkg list -Ho release $p) < $RTVER ]] && packages+=($p@latest)
+    done
+
     # Install/update the set of packages.
     # Explicitly manage the return code using "rc" to observe the result of this
     # command without exiting the script entirely (due to bash's "errexit").