* Set backupSchedule as required in MongoDB Flex instance
* Update example and generate docs
* Add regex explanation comment
* Fix acceptance test
* Fix map fields
* Onboard instance resource
* Add options.type as required field
* Implement resource unit tests
* Implement data source
* Implement acc tests
* Adjust update acc test
* Fix typo
* Adjust update unit tests
* Adjustments after review
* Minor adjustment for uniformity
* Adjustments after review