Merge branch 'net-page_pool-remove-page_pool_release_page'

Jakub Kicinski says:

====================
net: page_pool: remove page_pool_release_page()

page_pool_return_page() is a historic artefact from before
recycling of pages attached to skbs was supported. Theoretical
uses for it may be thought up but in practice all existing
users can be converted to use skb_mark_for_recycle() instead.

This code was previously posted as part of the memory provider RFC.
https://lore.kernel.org/all/20230707183935.997267-1-kuba@kernel.org/
====================

Link: https://lore.kernel.org/r/20230720010409.1967072-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>