Use GraphQL to prefetch data for DastProfile#edit

What does this MR do?

this merge request converts hand-rolled serialisation for dast_profiles over to use GraphQL following the same approach taken in !58735 (merged). using the GraphQL api as a single source of truth (ssot) means we can be more efficient by sharing code.

Related Issue(s)

Follow-up from "Retrieve Dast::Profile in controller"

Screenshots

Does this MR meet the acceptance criteria?

Conformity

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Availability and Testing

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Security

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