[Ubuntu] Get toolset value function. (#2435)

* [macOS] Fail Pester tests on error

* return it back

* [Ubuntu] add get_toolset_values function

* added fix

* fix all nitpicks

* try to get rid brackets

* removed brackets.

* pipx-package fix

images/linux/scripts/installers/gcc.sh

@@ -6,6 +6,7 @@
 
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/os.sh
+source $HELPER_SCRIPTS/install.sh
 
 function InstallGcc {
     version=$1
@@ -18,9 +19,7 @@ function InstallGcc {
 add-apt-repository ppa:ubuntu-toolchain-r/test -y
 apt-get update -y
 
-toolset="$INSTALLER_SCRIPT_FOLDER/toolset.json"
-
-versions=$(jq -r '.gcc.versions[]' $toolset)
+versions=$(get_toolset_value '.gcc.versions[]')
 
 for version in ${versions[*]}; do
     InstallGcc $version