Workflow::Clone leaks the workflow

[bdash]

Version and Platform (required):

• Binary Ninja Version: 5.1.7870-dev
• OS: macOS 15.5
• CPU Architecture: arm64

Bug Description:
Workflow::Clone passes the result of BNWorkflowClone into Workflow::Workflow which then calls BNNewWorkflowReference. Since BNWorkflowClone returns a +1 object, this results in an extra ref on the object that is leaked.

It looks like other C++ API types take ownership of the BNFoo* object that is passed to them rather than adding an additional reference. I haven't looked at clients of Workflow to determine whether that change is safe to make.

Steps To Reproduce:
I found this by doing:

1. MallocStackLoggingNoCompact=YES /path/to/binaryninja.app/Contents/MacOS/binaryninja
2. leaks binaryninja