salsa-ci.yml: Disable build path variations in reprotest

8 jobs for master in 9 minutes and 39 seconds (queued for 4 seconds)
latest
Status Job ID Name Coverage
  Build
passed #352199
build

00:03:18

 
  Test
passed #352204
autopkgtest

00:03:22

passed #352205
blhc

00:01:11

passed #352203
lintian

00:01:42

passed #352206
piuparts

00:06:18

passed #352202
reprotest

00:02:45

passed #352201
test-build-all

00:02:58

passed #352200
test-build-any

00:03:20