[client] handle new patch operation in bundle import (opencti #6728)

[JeremyCloarec]

Linked PR: OpenCTI-Platform/opencti#9504

Proposed changes

• imported bundle can now contain a opencti_operation with a 'patch' value. When that is the case, the patch contained in the opencti_field_patch of the bundle is used to execute a field patch on the imported entity instead of an upsert

Related issues

• opencti #6728

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...