fix: femove `vars` and `set`from reserved names (#1451)
fix: femove `vars` and `set`from reserved names (#1451)

This fixes https://github.com/googleapis/gapic-generator-python/issues/1348. This is also backwar compatible with already released clients dataform and network-services, because removal of unnecessary `_` is already happening in ppostprocesing scripts for those two affected apis.

googleapis/gapic-generator-python,googleapis/gapic-generator-python