fix(GraphQL): add validation of null values with correct order of graphql rule validation

[skrdgraph]

the previous merge was not squashed, this was the original PR #8320

… validation (#8007)

• fix: add validation of null values with correct order of graphql rule validation

Problem

Solution

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✅ dshekhar95
❌ aman-bansal
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[joshua-goldstein]

👍

[coveralls]

Coverage increased (+0.005%) to 37.107% when pulling 4f1d491 on cherry-pick-8008_new into a2babb8 on main.