Add conditions-based feature for approval requests

Description

Introduce a conditions-based feature that mandates the filling of specific fields before an approval request can be generated.

Jira expression API:
https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-jira-expressions/#api-rest-api-3-expression-eval-post

Jira expression:
https://developer.atlassian.com/cloud/jira/platform/jira-expressions/


Based on customer support ticket: