Enhance SCIM user claim update with pre-update profile action execution

[Lashen1227]

This pull request enhances the user claim update process in the SCIM user manager by introducing support for handling additional claim modifications via pre-update profile actions. It refactors the PreUpdateProfileActionExecutor to return detailed execution results, updates the claim modification logic to incorporate these results, and adjusts related tests accordingly.

Key changes include:

User claim update logic improvements:

• The updateUserClaims method in SCIMUserManager now uses a new helper method, populateMultiValuedClaimsToModify, to handle multi-valued claims, and processes additional claim modifications returned from the pre-update profile action executor. This allows dynamic modification of claims based on action execution results.
• The new populateMultiValuedClaimsToModify method consolidates logic for updating both single and multi-valued claims to be modified.

Pre-update profile action executor refactor:

• The PreUpdateProfileActionExecutor.execute method now returns an ActionExecutionStatus<?> object instead of void, allowing the caller to process results from action execution. The internal handleActionExecutionStatus method also returns this status object.

Related PR

• Enable pre profile update action to allow modifying user claims at profile update wso2/carbon-identity-framework#8124

[wso2-engineering]

AI Agent Log Improvement Checklist

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Comment	Accepted (Y/N)	Reason
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