Enforce the use of `deprecated-removed` in docs

In the docs we have two directives that can be used to document deprecations: deprecated and deprecated-removed.

I think we should always prefer the latter:

• it will make it easier to track and document removals
• it will give people a target, so they can plan around it

Even if the removal version gets postponed, it's better to postpone than to say that something is deprecated and then just remove it at an unspecified time in the future.

Currently deprecated is more commonly used:

$ grep -r 'deprecated::' --include=*.rst | wc -l
226
$ grep -r 'deprecated-removed::' --include=*.rst | wc -l
30

• set removal version for deprecated features using deprecated-removed
• automate the documentation of deprecations (see also #92308)
• possibly deprecate the deprecated directive and replace it with deprecated-removed

Comienza volviendo a ejecutar los recuentos documentados de grep para deprecated:: y deprecated-removed:: en los archivos .rst; después, revisa el trabajo relacionado en #92308. La lista de comprobación del issue indica que, para completarlo, habría que establecer las versiones de eliminación, considerar la automatización y decidir si se debe marcar como obsoleta la directiva antigua.