* Adding ability to override directory permissions for db backup
* adding new flag to usage.go
* Backup now has its own directory handling method to reduce footprint of prospective change
* removing unneeded test
* fixing build error
* switching to url param for override
* stripping flag
* adding in unit tests
* fixing a test
* minor changes for testing
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
