[PBM-1062] check backup type support · percona/percona-backup-mongodb@eea440a

Error return value of `p.GetConfig` is not checked (errcheck)

Error return value of `cn.Disconnect` is not checked (errcheck)

Error return value of `cn.Disconnect` is not checked (errcheck)

Error return value of `o.indexCatalog.DeleteIndexes` is not checked (errcheck)

Error return value of `sess.WithTransaction` is not checked (errcheck)

Error return value of `mongo.WithSession` is not checked (errcheck)

Error return value of `sess.AbortTransaction` is not checked (errcheck)

Error return value of `sess.WithTransaction` is not checked (errcheck)

Error return value of `mongo.WithSession` is not checked (errcheck)

Error return value of `sess.AbortTransaction` is not checked (errcheck)

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