TQPathManager can ignore local paths

Release notes

Extended functionality of path manager

Details

By default, the TQPathManager searches for files in the execution directory first and then in the environment variable or list of directories passed. This is done so that users can use their local config files, which might not be in the default location. Sometimes this behaviour in unwanted. This MR adds methods to find file paths while ignoring matches in the execution directory: findFileFromEnvVarWithoutExecDir(...) and findFileFromListWithoutExecDir(...).