All DateTime scalars are converted to UTC

[dr3]

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Describe the bug

All Dates are being converted to UTC. This Issue is to coordinate the fix with graphql-scalars library

graphql-hive/graphql-scalars#1848

To Reproduce Steps to reproduce the behavior:

N/A all DateTime scalars remove timezone values

Expected behavior

Accoring to the RFC 3339 spec, theres no reason they should adjust to UTC

Additional context

Previously discussed with @ardatan