Clear temporary folder

Although the script will ideally clean up after itself, leftover files in the temporary folder from a previous run could interfere with the script. In this case, the available IDE versions determination repository having been left behind from an aborted run broke install_ide().

Author: per1234

arduino-ci-script.sh

@@ -2329,6 +2329,7 @@ function check_library_manager_compliance() {
 set_script_verbosity 0
 
 # Create the temporary folder
+rm "$ARDUINO_CI_SCRIPT_TEMPORARY_FOLDER" --recursive --force
 create_folder "$ARDUINO_CI_SCRIPT_TEMPORARY_FOLDER"
 
 # Create the report folder