[3.12] GH-108390: Prevent non-local events being set with sys.monitoring.set_local_events() (GH-108420)

[markshannon]

Manual backport of #108420

• Issue: Crash when tracing specialized normal class call at deep Python recursion #108390

[markshannon]

#108420 (which this is a backport of) shrinks the local_monitors and active_monitors arrays in the code object.

For the backport only, I'm going to restore them to the original size. This wastes space, but maintains ABI compatibility.

[markshannon]

@Yhg1s
As discussed on discord, the ABI changes are just renames. The _Py_Monitors struct has been renamed to _Py_LocalMonitors and _Py_GlobalMonitors depending on the context. The size and shape remain unchanged.