Code changes to get the certificates from the certificates column with fallback

[ShankarSinghC]

The migration api can be run on the deployment environment only after the 100% deployment of the specific version of hyperswitch, because there are probabilities of merchant account being created even during the deployments. Once deployment beings the apple pay details must be read from the metadata only until the migrations are done. Hence we need a fallback here which tries to read the apple pay data from the newly added column whenever need and if it fails we just log the error and try to read the apple pay data from the metadata.

Once the migration is done we can check for the error log lines during the read form newly added column, if there are no logs we can remove the fallback in future. Else we might need to rerun the migrations for the specific merchant connector account.