[release/6.0] Fix NRT warnings in source generated code #59817
Merged
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Backport of #59755 to release/6.0
/cc @eiriktsarpalis
Customer Impact
The System.Text.Json source generator produces nullability warnings when generating code for types containing nullable properties. This can result in compiler errors for projects that treat warnings as errors and forces users to disable nullable annotations project-wide. This is a customer reported bug.
Testing
Tests have been added that validate that the impacted use cases compile as expected.
Risk
Low. Updates the product code so that suppressions are inserted on expressions that require it.