Omitempty givenName attribute when create user #5431

[2403905]

Description

Related Issue

• Fixes <issue_link>

How Has This Been Tested?

• test environment: local, curl
• test case 1:

curl -k -X 'POST' -u admin:admin  'https://localhost:9200/graph/v1.0/users' --data '{ "onPremisesSamAccountName": "test1", "displayName":"test1", "mail":"[email protected]"}' | jq .

{
  "displayName": "test1",
  "id": "681dca41-b674-49f6-84c2-5ebf48b92851",
  "mail": "[email protected]",
  "onPremisesSamAccountName": "test1",
  "surname": "test1",
  "userType": "Member"
}

Screenshots (if appropriate):

Types of changes

• 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 change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

[sonarcloud]

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