matrix-api: Upload filter and use it for sync

So that the network usage can be reduced
7 jobs for wip/sadiq/matrix-filter in 10 minutes and 51 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #372259
librem5
build-pureos-gcc-byzantium

00:02:41

 
  Test
passed #372261
librem5
check-po

00:00:32

passed #372260
librem5
test:debian-gcc

00:02:39

21.2%
 
  Package
passed #372262
librem5
package-pureos-byzantium

00:01:39

passed #372263
librem5:arm64
package-pureos-byzantium:arm64

00:05:28

 
  Test Package
passed #372264
librem5
autopkgtest-pureos-byzantium-package

00:01:18

passed #372265
librem5
lintian-pureos-byzantium-package

00:00:53