feat: Add UsernameAttributeClaimMapping field to OIDC Settings struct in /v3/sso (11.19)

[neilmartin83]

Change

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New field in request/response body we can set in the API as of 11.19. Relates to OIDC/Jamf Account SSO config.

Type of Change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update (Wiki)
• Refactor (refactoring code, removing code, changing code structure)

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