JiraConnect::SyncDeploymentsWorker failing with error TypeError

What does this MR do and why?

This MR fixes a TypeError in JiraConnect::SyncDeploymentsWorker that was causing repeated failures and impacting the groupimport error budget.

Problem

The worker was failing with: TypeError: no implicit conversion of String into Integer

This occurred because the code assumed Jira API error responses would always be arrays, when calling .map on a hash, Ruby interprets it as iterating over key-value pairs, causing the type error.

Solution

1. Added type checking in error handling to support both response formats
2. Extracted error parsing logic into a dedicated parse_jira_error_messages method to:
3. Added test coverage for all error response scenarios

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Added unit tests covering array, hash, and edge case responses
• All existing tests continue to pass

MR acceptance checklist

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Related to #553614 (closed)