fix: handle case of text when invalid JSON (#3119)

[TheoD02]

Description

This PR addresses the issue where Bruno crashes when receiving non-JSON responses (like "true") with the application/json content type. The crash was caused by Bruno attempting to parse an invalid JSON response. The fix modifies the return data handling to prevent the crash.

fix: #3119

Changes Implemented:

1. Modified return data handling:

   • The response data is now passed through safeStringifyJSON(data) to ensure that even non-JSON responses are handled safely without causing a crash.

2. Early return for null data:

   • Added an early return if data is null, ensuring that the logic to process the response is skipped, preventing potential errors from treating null as data.

3. Removed unused parameter:

   • Removed the second parameter in safeStringifyJSON calls where it was set to true, since the function definition only expects one parameter.

Testing and Validation:

• This fix has been tested to ensure that valid JSON responses are still handled correctly.
• Cases where non-JSON responses like "true" are returned now no longer cause the client to crash.
• Additional edge cases, such as null responses, are properly handled with the early return.

Contribution Checklist:

• The pull request only addresses one issue or adds one feature.
• The pull request does not introduce any breaking changes
• I have added screenshots or gifs to help explain the change if applicable.*
• I have read the contribution guidelines.
• Create an issue and link to the pull request.