NIFI-14233: Fix PropertyDependency crash with imported PropertyDescriptor

[hsahu-ksolves123]

## Summary
Fixes NIFI-14233 where using imported PropertyDescriptor in PropertyDependency causes KeyError crashes in NiFi 2.1.0+.

## Problem

• When developing Python processors for NiFi, it is often necessary to share properties and methods across multiple processors by placing them into a shared module and importing them into each processor class.

## Solution

• Enhanced resolve_dependencies() to handle ast.Attribute nodes for imported properties
• Added dual property lookup: discovered_property_descriptors + module_string_constants

## Testing

• Added test case verifying ast.Attribute node handling
• Python syntax validation successful

## Files Changed

• ProcessorInspection.py - Enhanced dependency resolution method
• test_fix.py - Verification test for the fix

[hsahu-ksolves123]

Hi team, I have completed the changes for this ticket and pushed the updates. I haven’t received any feedback yet, so kindly review the PR when you get a chance. Thank you.

[exceptionfactory]

@hsahu-ksolves123 The proposed change has several implementation issues. The resolve_dependencies method should remain unchanged. The visit_Assign method includes code for building up the list of Property Descriptors, so changes should be considered in that method instead.

In addition, the test file is not located in the correct directory. The src/test/python directory contains Python test files. The TestExtensionManager.py is the class that should be updated with a new Processor example, or perhaps a new test class for ProcessorInspection.

If you are able to change the approach and address these issues, please proceed to update this pull request.

[hsahu-ksolves123]

Okay i will be working on the changes you have suggested to made and update the things accordingly you instructed and will update the pr.