Deprecate dependencies, libraries, modules, and themes that will be removed from Drupal 11 core

Tour policy is RTBC, added a child meta.

Formatting

Thanks @quietone, I _think_ we might run into some issues/have to look at our extension deprecation policy now that we're deprecating without an actual code base for the removal, but I'll voice my (per usual) valid/invalid concerns in the tour deprecation issue :)

Reworking the IS a bit based on which module removals have signoff, which have consensus and are pending signoff, and which are still in discussion.

Update module to be deprecated

I've added 📌 Remove deprecated modules from update testing database dumps etc. Active to remove deprecated modules from testing database dumps in bulk - the idea being that it should hopefully be much less work, and as reviewable, to remove 3-4 modules from a database dump in one issue, vs. one issue for each.

Removed "Modules that need further discussion" since that work will not be done before Drupal 11.

Add SDC

Just Statistics to deprecate.

All extension deprecations that will completed in this issue are complete.

Hopefully, the Field Layout can be deprecated in the Drupal 11 cycle.