cli: skip validating scalar result types

[hgiasac]

Fix the redundant validation to scalar result types

[github-actions]

Package	Line Rate	Health
github.com/hasura/ndc-sdk-go/cmd/hasura-ndc-go/command/internal	83%	✔
github.com/hasura/ndc-sdk-go/cmd/hasura-ndc-go/command	40%	❌
github.com/hasura/ndc-sdk-go/cmd/hasura-ndc-go/version	43%	➖
github.com/hasura/ndc-sdk-go/connector	53%	➖
github.com/hasura/ndc-sdk-go/example/reference	57%	➖
github.com/hasura/ndc-sdk-go/ndctest	51%	➖
github.com/hasura/ndc-sdk-go/scalar	97%	✔
github.com/hasura/ndc-sdk-go/schema	50%	➖
github.com/hasura/ndc-sdk-go/utils	34%	❌
Summary	53% (6489 / 12198)	➖

Minimum allowed line rate is 40%