Refresh dependency inspector_protocol for Python 3 compatibility

[cclauss]

• Version: all
• Platform: all
• Subsystem: inspector_protocol

As discussed in #24512 @bmsdave and @thefourtheye have successfully landed Python 3 syntax error fixes into upstream. This is a mutually beneficial way that we give back to the projects that we rely on. Given this progress, we should now sync with upstream to continue the process of eliminating Python 3 syntax errors from our codebase.

[cclauss]

@targos Are we progressing on this issue?

[targos]

@cclauss thanks for the reminder! I have a wip branch to update our copy of inspector_protocol but it need a bit more work (adapt our C++ code to the changes).

[targos]

I opened #26154. I can hopefully come back to it next week.