[bug-fix] Permission revoked approver can still perform workflow approval tasks

[NutharaNR]

Purpose

Update pending approval task corresponding to the workflow, when the flow is updated.

Approach

Invoke approvalService method to update pending approval request upon successful workflow update.

Related Issues

• Permission revoked approver can still perform workflow approval tasks product-is#25308

Related PRs

• [bug-fix] Permission revoked approver can still perform workflow approval tasks wso2-extensions/identity-workflow#27

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[wso2-engineering-bot]

AI Agent Log Improvement Checklist

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Comment	Accepted (Y/N)	Reason
#### Log Improvement Suggestion No: 1
#### Log Improvement Suggestion No: 2

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/17419342432

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PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/17419342432
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/17419342432