Update populate registry to use file based approch

[nocturnalastro]

SQLite approch has been depricated so using the proceedure found here https://github.com/redhat-openshift-ecosystem/community-operators-prod/issues/793#issuecomment-1036213702

[nocturnalastro]

@p3ck @thekad could you guys review this PR for me :) it fixes issue #253