Remove Organization in pre-issue access token Request.

[Thisara-Welmilla]

Issue:

• Remove Organization in pre-issue access token Request. wso2/product-is#23398

In the pre-issue access token extension for a sub-organization context, consider the following for the organization sent in the request to an external service:

1. The organization must be a sub-organization of the authorization server to which the application belongs.
2. Currently, pre-issue access tokens are not available for sub-organizations.
3. Therefore, the authorization server will always be the root tenant.

Given the above, the organization sent in the request to the external service will always be null.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/13756292976

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.67%. Comparing base (07d921a) to head (117ba12).
Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2742      +/-   ##
============================================
+ Coverage     56.23%   56.67%   +0.44%     
+ Complexity     8787     8644     -143     
============================================
  Files           654      654              
  Lines         50304    48991    -1313     
  Branches      10584    10358     -226     
============================================
- Hits          28290    27768     -522     
+ Misses        17972    17298     -674     
+ Partials       4042     3925     -117     

Flag	Coverage Δ
unit	40.07% <ø> (+0.09%)	⬆️

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PR builder started
Link: https://github.com/wso2/product-is/actions/runs/13757561372

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PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/13757561372
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/13757561372

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PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/13756292976
Status: cancelled