TYP: Add missing methods to `NaTType` stub

[randolf-scholz]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

A few methods supported by pd.NaT are missing in the stub.

Feature Description

• __pos__ and __neg__
• __mul__
• __truediv__ and __floordiv__

Alternative Solutions

N/A

Additional Context

No response