[monitoring] fix: use backoff for writing the value (#3697)
[monitoring] fix: use backoff for writing the value (#3697)

* [monitoring] fix: use backoff for writing the value

fixes #3694

* use uuid
GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples