FINERACT-2571: Migrate charge creation helper to feign client

[lliikkii7722-ops]

This change migrates a deprecated helper method in ChargesHelper from RestAssured (Utils.performServerPost) to the feign client approach using FineractClientHelper.

This aligns with the ongoing effort to modernize integration tests and reduce direct HTTP usage.

Only a single method is migrated in this PR to keep the change minimal and review-friendly.

[IOhacker]

@lliikkii7722-ops please have a conversation about the ticket in the Apache Fineract dev list and make sure to include a Jira ticket in the Commit description and PR Title. Also make sure to review the developer convention.

[lliikkii7722-ops]

@lliikkii7722-ops please have a conversation about the ticket in the Apache Fineract dev list and make sure to include a Jira ticket in the Commit description and PR Title. Also make sure to review the developer convention.

Thank you for the guidance.

I understand that a Jira ticket and mailing list discussion are required.
I will initiate a discussion on the Apache Fineract dev mailing list for this change.

Please let me know if I should wait for discussion approval before updating the PR.

Thank you.

[lliikkii7722-ops]

@lliikkii7722-ops please have a conversation about the ticket in the Apache Fineract dev list and make sure to include a Jira ticket in the Commit description and PR Title. Also make sure to review the developer convention.

Thank you for the guidance.

I have created the Jira ticket FINERACT-2571 and updated the PR title and commit message accordingly.

I will initiate a discussion on the Apache Fineract dev mailing list for this change.

Please let me know if I should wait for mailing list discussion approval before further updates.

Thank you.

[Aman-Mittal]

@lliikkii7722-ops Please sign your commits

[lliikkii7722-ops]

@lliikkii7722-ops Please sign your commits

i will do thankyou !