build: catch2 is installed with using conan instead of FetchContent

Author: henryborchers

Jenkinsfile

@@ -332,7 +332,7 @@ def linux_wheels(pythonVersions, testPackages, params, wheelStashes, sharedPipCa
                                                 } finally{
                                                     sh "${tool(name: 'Default', type: 'git')} clean -dfx"
                                                     sh(label:'untagging image',
-                                                       script: """if [[ ! -z $(docker images -q ${dockerImageName}) ]]; then
+                                                       script: """if [[ ! -z \$(docker images -q ${dockerImageName}) ]]; then
                                                                      docker rmi ${dockerImageName}
                                                                   fi
                                                                """