Reducing the token synchronize weight for existing tokens

[indeewari]

Proposed changes in this pull request

The synchronize block at the token issuance path seems to lock read only flow, where issuing existing token. For readonly flow, there is no requirement of a synchronize lock. This refactoring reduces the traffic at the synchronized block.

When should this PR be merged

After approval of the Authorization product team and the product owner.

Follow up actions

PR builder test success and QA approval.

[codecov]

Codecov Report

Attention: Patch coverage is 53.57143% with 13 lines in your changes missing coverage. Please review.

Project coverage is 56.05%. Comparing base (4e516a5) to head (aa3e9f5).

Files with missing lines	Patch %	Lines
...dlers/grant/AbstractAuthorizationGrantHandler.java	53.57%	6 Missing and 7 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2660      +/-   ##
============================================
+ Coverage     55.65%   56.05%   +0.39%     
+ Complexity     8540     8404     -136     
============================================
  Files           654      654              
  Lines         49129    48228     -901     
  Branches       9817     9647     -170     
============================================
- Hits          27343    27034     -309     
+ Misses        17853    17328     -525     
+ Partials       3933     3866      -67     

Flag	Coverage Δ
unit	39.55% <53.57%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12685956036

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12685956036
Status: failure

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12686897131

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12686897131
Status: failure

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12966718542

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12966718542
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/12966718542

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12976490937

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12976490937
Status: failure

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12976595557

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12976595557
Status: failure

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12982245036

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12982245036
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/12982245036