bpo-42800: Add audit events for f_code and tb_frame (GH-24182)

Accessing the following attributes will now fire PEP 578 style audit hooks as (object.__getattr__, obj, name):
* PyTracebackObject: tb_frame
* PyFrameObject: f_code
* PyGenObject: gi_code, gi_frame
* PyCoroObject: cr_code, cr_frame
* PyAsyncGenObject: ag_code, ag_frame

• Doc/library/audit_events.rst[diff]
• Doc/library/stdtypes.rst[diff]
• Doc/reference/datamodel.rst[diff]
• Misc/ACKS[diff]
• Misc/NEWS.d/next/Security/2021-01-09-17-07-36.bpo-42800._dtZvW.rst[Added - diff]
• Objects/frameobject.c[diff]
• Objects/genobject.c[diff]
• Python/traceback.c[diff]