Fix type annotations for pandas.core.indexes.datetimelike
Part of #25882

Current errors are:

    pandas\core\indexes\datetimelike.py:65: error: "Callable[[Any], Any]" has no attribute "fget"
    pandas\core\indexes\datetimelike.py:66: error: "Callable[[Any], Any]" has no attribute "fget"
    pandas\core\indexes\datetimelike.py:67: error: "Callable[[Any], Any]" has no attribute "fget"
    pandas\core\indexes\datetimelike.py:69: error: "Callable[[Any], Any]" has no attribute "fget"
    pandas\core\indexes\datetimelike.py:70: error: "Callable[[Any], Any]" has no attribute "fget"
    pandas\core\indexes\datetimelike.py:137: error: Decorated property not supported
    pandas\core\indexes\datetimelike.py:207: error: Name '_box_values' already defined on line 72
    pandas\core\indexes\datetimelike.py:761: error: Need type annotation for '_raw_methods'
    pandas\core\indexes\datetimelike.py:763: error: Need type annotation for '_raw_properties'