v21.12 service pack 3

The usual service pack discussion issue, suggestions welcome.

• mmsd-tng 1.9 drop tmp/mmsd-tng from release branch

  • I made an executive decision to just upgrade mmsd-tng in alpine aports 3.15, since that version is a lot more usable than the version in aports. -clayton
  • see: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/31398

• squeekboard 1.16

• phosh: automounting disks (!2905 (closed))

  • portfolio 0.9.13

• dino 0.3

• upgrade N900 kernel to latest (18046f68)

• postmarketos-ui-phosh: enable waked by default (!2963 (closed))

• linux-postmarketos-qcom-msm8996 upgrade to 5.16.12 (!2979)

• linux-postmarketos-qcom-sdm845 upgrade to 5.16.12

• build pinephone keyboard as module (https://gitlab.postmarketos.org/postmarketos/pmaports/-/merge_requests/2966)

ETA: calendar week 10