[Ubuntu] Create symlink for Pester test running (#2349)

* Create symlink for test running

* Fix 1604 and 2004 templates

* Fix php and haskell running

* Minor fix

* Fix new added tests

* Fix symlink

* Minor fix

* Fix script permissions

* Minor fix

* Fix firefox and rust tests

* Fix new merged tests

images/linux/scripts/installers/pulumi.sh

@@ -6,7 +6,6 @@
 
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/install.sh
-source $HELPER_SCRIPTS/invoke-tests.sh
 
 # Install Pulumi
 VERSION=$(curl --fail --silent -L "https://www.pulumi.com/latest-version")