Add config to return valid name id format

[SujanSanjula96]

Proposed changes in this pull request

$Subject to fix the inconsistency in API response regarding the SAML name ID format.

Issue -wso2/product-is#21826

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12622471719

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.62%. Comparing base (705a08e) to head (4b6a568).
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6256      +/-   ##
============================================
+ Coverage     45.48%   45.62%   +0.13%     
+ Complexity    14185    14127      -58     
============================================
  Files          1633     1633              
  Lines        101514   101444      -70     
  Branches      17982    17869     -113     
============================================
+ Hits          46177    46281     +104     
+ Misses        48571    48427     -144     
+ Partials       6766     6736      -30     

Flag	Coverage Δ
unit	28.47% <ø> (+0.01%)	⬆️

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[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12622471719
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/12622471719