BUG: Fix NA comparison inconsistency for object dtype Series

[majiayu000]

Summary

Fix comp_method_OBJECT_ARRAY to return BooleanArray when input contains pd.NA values, ensuring NA is properly propagated in comparison results instead of returning False.

Problem

Previously, when comparing an object dtype Series containing pd.NA with a scalar:

x = pd.Series([1, 2, pd.NA])
x[2] == 3  # Returns <NA> (correct)
x == 3     # Returns [False, False, False] (incorrect - third element should be <NA>)

Solution

Modified comp_method_OBJECT_ARRAY to detect pd.NA values in the input and return a BooleanArray with proper NA masking instead of a plain boolean array.

After fix

x = pd.Series([1, 2, pd.NA])
x[2] == 3  # Returns <NA>
x == 3     # Returns [False, False, <NA>] (now consistent)

Closes #63328