Q3 merge updates

[lesshonor]

1. This line got lost.

   vial-qmk/quantum/dynamic_keymap.c

   Line 23 in fbf1c16

   #include <string.h>

2. Unifies a number of dual-submission keyboards with their upstream files/folders. This mostly involves the deletion of files that had their configurations migrated to the data-driven format, but in some cases wires got crossed generally or there were files/changes that should never have been present in the first place.
3. s/WS2812/ws2812 where that broke after the recent merge, and migrates/updates getawayvan (...this keymap still needs to be moved under esca/getawayvan eventually)
4. password and sinpad20 already have Vial keymaps, so
   a. password's default keymap does not need a vial.json
   b. there is no point in preserving the unbuildable via keymap for sinpad20