Fix: SCIM error handling for group display name (fixes #20344)

[BimsaraBodaragama]

Purpose

Fix SCIM error handling to provide appropriate messages when a group display name is used instead of a group ID.

Goals

To ensure compliance with RFC 7644 and provide clear, actionable error messages to users when an invalid request is made with a group display name.

Approach

• Implemented error response with scimType set to invalidSyntax for requests using a group display name instead of a group ID.
• Provided a clear and concise error message in the detail field.
• Handled the fix for both V1 and V2 roles.
• Ensured the error response adhered to the SCIM specification.

Issue

Resolves #20334

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✅ BimsaraBodaragama
❌ Bimsara Bodaragama

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