Incorrect documentation for get_post_types()

[barryceelen]

The documentation for get_post_types() incorrectly states that the function accepts 'or' or 'and' as its $operator.

It uses the wp_filter_object_list() function, which in turn uses the wp_list_filter() function, which both accept the 'not' operator. Since there is nothing in the get_post_types() function preventing use of the 'not' operator it supports the 'not' operator as well.

[barryceelen]

Fix wp_filter_object_list() and get_post_types() documentation.

[SergeyBiryukov]

In 36090:

Docs: Clarify that wp_filter_object_list() accepts 'not' as its $operator parameter.

Props barryceelen.
See #35225.

[SergeyBiryukov]

In 36091:

Docs: Clarify that get_post_types() accepts 'not' as its $operator parameter.

Props barryceelen.
Fixes #35225.