When an invalid value is entered as interval for PeriodicExportingMetricReader, there is an error message generated here that states:

                f"interval value {self._export_interval_millis} is invalid \
                and needs to be larger than zero and lower than infinity."

However, this is not correct and misleading as math.inf can be provided as a value (which will effectively set the interval to infinity and make periodic exporting metric reader to not move in interval, which is something that this PR addressed.

What is the expected behavior?
Error message should state:

                f"interval value {self._export_interval_millis} is invalid \
                and needs to be larger than zero and lower or equal to infinity."