Improve documentation for common sequence methods

[AA-Turner]

From @serhiy-storchaka in #101100

My suggestion for stdtypes.rst:

Leave the statements and operators in the tables, but document all methods using normal Sphinx syntax, e.g.:

.. method:: sequence.append(value, /)

Then make anchors for list.append(), bytearray.append(), deque.append(), etc linked to this definition (there is a way to do this without cluttering the text and index). For example:

.. method:: list.append(value, /)
            bytearray.append(value, /)
   :no-typesetting:
   :no-index-entry:
.. method:: sequence.append(value, /)

Linked PRs

• GH-138465: Improve documentation for common sequence methods #138474
• [3.14] GH-138465: Improve documentation for common sequence methods (GH-138474) #138560
• [3.13] GH-138465: Improve documentation for common sequence methods (GH-138474) #138567