refactor: [Noon] adding new field max_amount to mandate request

[swangi-kumari]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Resolves #3844

Note
1.While connector create ensure test_mode is set to true
2.Ensure the currency passed is AED and country is AE

How did you test it?

1.Create a CIT with noon
with

  "connector_metadata": {
        "noon": {
            "order_category": "pay"
        }
    }

without order_category it should throw an error

2. Make a MIT

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable

[SamraatBansal]

The testing should be consistent across local DB, the response and the noon dashboard so things like amount validation don't get missed

[AkshayaFoiger]

The testing should be consistent across local DB, the response and the noon dashboard so things like amount validation don't get missed

Tested, mandate amount remains consistent in the local DB and dashboard