CI: do the rebuilds via kaniko.

1 job from ci-changes in 31 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #241219
build

00:00:31

 
Name Stage Failure
failed
build Build
From https://code.videolan.org/videolan/docker-images-aarch64
+ d9ca3ad...2775de0 ci-changes -> origin/ci-changes (forced update)
Checking out 2775de0f as ci-changes...
Skipping Git submodules setup
$ echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json # collapsed multi-line command
Changed images: ' dav1d-debian-unstable'
/bin/bash: command substitution: line 81: unexpected EOF while looking for matching `''
/bin/bash: command substitution: line 82: syntax error: unexpected end of file
ERROR: Job failed: exit code 1